diff --git a/Libraries/ART/ReactNativeART.js b/Libraries/ART/ReactNativeART.js
index 465ddc6b13f21b..760b5ff809de40 100644
--- a/Libraries/ART/ReactNativeART.js
+++ b/Libraries/ART/ReactNativeART.js
@@ -297,7 +297,7 @@ function insertOffsetsIntoArray(stops, targetArray, atIndex, multi, reverse) {
   let i = 0;
   if ('length' in stops) {
     while (i < stops.length) {
-      offsetNumber = i / (stops.length - 1) * multi;
+      offsetNumber = (i / (stops.length - 1)) * multi;
       targetArray[atIndex + i] = reverse ? 1 - offsetNumber : offsetNumber;
       i++;
     }
@@ -530,7 +530,7 @@ function LinearGradient(stops, x1, y1, x2, y2) {
   const type = LINEAR_GRADIENT;
 
   if (arguments.length < 5) {
-    const angle = (x1 == null ? 270 : x1) * Math.PI / 180;
+    const angle = ((x1 == null ? 270 : x1) * Math.PI) / 180;
 
     let x = Math.cos(angle);
     let y = -Math.sin(angle);
diff --git a/Libraries/Animated/src/Easing.js b/Libraries/Animated/src/Easing.js
index c5e54b24723ee9..94fb865882c040 100644
--- a/Libraries/Animated/src/Easing.js
+++ b/Libraries/Animated/src/Easing.js
@@ -131,7 +131,7 @@ class Easing {
    * http://easings.net/#easeInSine
    */
   static sin(t: number) {
-    return 1 - Math.cos(t * Math.PI / 2);
+    return 1 - Math.cos((t * Math.PI) / 2);
   }
 
   /**
@@ -164,7 +164,7 @@ class Easing {
    */
   static elastic(bounciness: number = 1): (t: number) => number {
     const p = bounciness * Math.PI;
-    return t => 1 - Math.pow(Math.cos(t * Math.PI / 2), 3) * Math.cos(t * p);
+    return t => 1 - Math.pow(Math.cos((t * Math.PI) / 2), 3) * Math.cos(t * p);
   }
 
   /**
diff --git a/Libraries/Animated/src/__tests__/Easing-test.js b/Libraries/Animated/src/__tests__/Easing-test.js
index 1e2a3a2f4a7ce6..0284f3f0b697ef 100644
--- a/Libraries/Animated/src/__tests__/Easing-test.js
+++ b/Libraries/Animated/src/__tests__/Easing-test.js
@@ -81,7 +81,7 @@ describe('Easing', () => {
 
   function sampleEasingFunction(easing) {
     const DURATION = 300;
-    const tickCount = Math.round(DURATION * 60 / 1000);
+    const tickCount = Math.round((DURATION * 60) / 1000);
     const samples = [];
     for (let i = 0; i <= tickCount; i++) {
       samples.push(easing(i / tickCount));
diff --git a/Libraries/Animated/src/animations/DecayAnimation.js b/Libraries/Animated/src/animations/DecayAnimation.js
index 78f6e2b7cc8524..a6fe05bb3f6343 100644
--- a/Libraries/Animated/src/animations/DecayAnimation.js
+++ b/Libraries/Animated/src/animations/DecayAnimation.js
@@ -81,8 +81,7 @@ class DecayAnimation extends Animation {
 
     const value =
       this._fromValue +
-      this._velocity /
-        (1 - this._deceleration) *
+      (this._velocity / (1 - this._deceleration)) *
         (1 - Math.exp(-(1 - this._deceleration) * (now - this._startTime)));
 
     this._onUpdate(value);
diff --git a/Libraries/Animated/src/animations/SpringAnimation.js b/Libraries/Animated/src/animations/SpringAnimation.js
index 2bc610eed752b7..a0f38d3b024e5c 100644
--- a/Libraries/Animated/src/animations/SpringAnimation.js
+++ b/Libraries/Animated/src/animations/SpringAnimation.js
@@ -266,7 +266,7 @@ class SpringAnimation extends Animation {
       position =
         this._toValue -
         envelope *
-          ((v0 + zeta * omega0 * x0) / omega1 * Math.sin(omega1 * t) +
+          (((v0 + zeta * omega0 * x0) / omega1) * Math.sin(omega1 * t) +
             x0 * Math.cos(omega1 * t));
       // This looks crazy -- it's actually just the derivative of the
       // oscillation function
@@ -274,7 +274,7 @@ class SpringAnimation extends Animation {
         zeta *
           omega0 *
           envelope *
-          (Math.sin(omega1 * t) * (v0 + zeta * omega0 * x0) / omega1 +
+          ((Math.sin(omega1 * t) * (v0 + zeta * omega0 * x0)) / omega1 +
             x0 * Math.cos(omega1 * t)) -
         envelope *
           (Math.cos(omega1 * t) * (v0 + zeta * omega0 * x0) -
diff --git a/Libraries/Animated/src/nodes/AnimatedInterpolation.js b/Libraries/Animated/src/nodes/AnimatedInterpolation.js
index e8f9823c20e4f4..067efbca731f9c 100644
--- a/Libraries/Animated/src/nodes/AnimatedInterpolation.js
+++ b/Libraries/Animated/src/nodes/AnimatedInterpolation.js
@@ -358,7 +358,7 @@ class AnimatedInterpolation extends AnimatedWithChildren {
       }
       if (/deg$/.test(value)) {
         const degrees = parseFloat(value) || 0;
-        const radians = degrees * Math.PI / 180.0;
+        const radians = (degrees * Math.PI) / 180.0;
         return radians;
       } else {
         // Assume radians
diff --git a/Libraries/Animated/src/nodes/AnimatedModulo.js b/Libraries/Animated/src/nodes/AnimatedModulo.js
index 6699ded50a658a..a3968566e9a2c4 100644
--- a/Libraries/Animated/src/nodes/AnimatedModulo.js
+++ b/Libraries/Animated/src/nodes/AnimatedModulo.js
@@ -32,7 +32,7 @@ class AnimatedModulo extends AnimatedWithChildren {
 
   __getValue(): number {
     return (
-      (this._a.__getValue() % this._modulus + this._modulus) % this._modulus
+      ((this._a.__getValue() % this._modulus) + this._modulus) % this._modulus
     );
   }
 
diff --git a/Libraries/Color/normalizeColor.js b/Libraries/Color/normalizeColor.js
index 690090b8c9ca0c..edede79ee6e267 100755
--- a/Libraries/Color/normalizeColor.js
+++ b/Libraries/Color/normalizeColor.js
@@ -188,7 +188,7 @@ function parse255(str: string): number {
 
 function parse360(str: string): number {
   const int = parseFloat(str);
-  return ((int % 360 + 360) % 360) / 360;
+  return (((int % 360) + 360) % 360) / 360;
 }
 
 function parse1(str: string): number {
diff --git a/Libraries/Components/Keyboard/KeyboardAvoidingView.js b/Libraries/Components/Keyboard/KeyboardAvoidingView.js
index 104fabd0f53af5..4973fd4a0a3805 100644
--- a/Libraries/Components/Keyboard/KeyboardAvoidingView.js
+++ b/Libraries/Components/Keyboard/KeyboardAvoidingView.js
@@ -171,7 +171,10 @@ class KeyboardAvoidingView extends React.Component<Props, State> {
         return (
           <View
             ref={viewRef}
-            style={StyleSheet.compose(style, heightStyle)}
+            style={StyleSheet.compose(
+              style,
+              heightStyle,
+            )}
             onLayout={this._onLayout}
             {...props}>
             {children}
@@ -186,9 +189,12 @@ class KeyboardAvoidingView extends React.Component<Props, State> {
             onLayout={this._onLayout}
             {...props}>
             <View
-              style={StyleSheet.compose(contentContainerStyle, {
-                bottom: bottomHeight,
-              })}>
+              style={StyleSheet.compose(
+                contentContainerStyle,
+                {
+                  bottom: bottomHeight,
+                },
+              )}>
               {children}
             </View>
           </View>
@@ -198,7 +204,10 @@ class KeyboardAvoidingView extends React.Component<Props, State> {
         return (
           <View
             ref={viewRef}
-            style={StyleSheet.compose(style, {paddingBottom: bottomHeight})}
+            style={StyleSheet.compose(
+              style,
+              {paddingBottom: bottomHeight},
+            )}
             onLayout={this._onLayout}
             {...props}>
             {children}
diff --git a/Libraries/Components/Slider/Slider.js b/Libraries/Components/Slider/Slider.js
index a7998ef28bfc33..aacfb14f34cb47 100644
--- a/Libraries/Components/Slider/Slider.js
+++ b/Libraries/Components/Slider/Slider.js
@@ -199,7 +199,10 @@ const Slider = (
     forwardedRef?: ?React.Ref<'RCTActivityIndicatorView'>,
   |}>,
 ) => {
-  const style = StyleSheet.compose(styles.slider, props.style);
+  const style = StyleSheet.compose(
+    styles.slider,
+    props.style,
+  );
 
   const onValueChange =
     props.onValueChange &&
diff --git a/Libraries/Components/Switch/Switch.js b/Libraries/Components/Switch/Switch.js
index c1d38619a6acc5..39ccd9a1de16e2 100644
--- a/Libraries/Components/Switch/Switch.js
+++ b/Libraries/Components/Switch/Switch.js
@@ -134,7 +134,10 @@ class Switch extends React.Component<Props> {
               : this.props.tintColor,
           }
         : {
-            style: StyleSheet.compose(styles.rctSwitchIOS, this.props.style),
+            style: StyleSheet.compose(
+              styles.rctSwitchIOS,
+              this.props.style,
+            ),
           };
 
     return (
diff --git a/Libraries/Lists/FlatList.js b/Libraries/Lists/FlatList.js
index c9b1b94c9104d3..cfa4ae85808824 100644
--- a/Libraries/Lists/FlatList.js
+++ b/Libraries/Lists/FlatList.js
@@ -614,7 +614,11 @@ class FlatList<ItemT> extends React.PureComponent<Props<ItemT>, void> {
         'Expected array of items with numColumns > 1',
       );
       return (
-        <View style={StyleSheet.compose(styles.row, columnWrapperStyle)}>
+        <View
+          style={StyleSheet.compose(
+            styles.row,
+            columnWrapperStyle,
+          )}>
           {item.map((it, kk) => {
             const element = renderItem({
               item: it,
diff --git a/Libraries/Lists/VirtualizedList.js b/Libraries/Lists/VirtualizedList.js
index 004599e8d76c1d..56364823f06d49 100644
--- a/Libraries/Lists/VirtualizedList.js
+++ b/Libraries/Lists/VirtualizedList.js
@@ -1369,7 +1369,7 @@ class VirtualizedList extends React.PureComponent<Props, State> {
       /* $FlowFixMe(>=0.63.0 site=react_native_fb) This comment suppresses an
        * error found when Flow v0.63 was deployed. To see the error delete
        * this comment and run Flow. */
-      this.props.onEndReachedThreshold * visibleLength / 2;
+      (this.props.onEndReachedThreshold * visibleLength) / 2;
     // Mark as high priority if we're close to the start of the first item
     // But only if there are items before the first rendered item
     if (first > 0) {
diff --git a/Libraries/Lists/VirtualizedSectionList.js b/Libraries/Lists/VirtualizedSectionList.js
index 63c7d9ecdcb66d..616d976bbe12ef 100644
--- a/Libraries/Lists/VirtualizedSectionList.js
+++ b/Libraries/Lists/VirtualizedSectionList.js
@@ -457,7 +457,7 @@ class ItemWithSeparator extends React.Component<
   static getDerivedStateFromProps(
     props: ItemWithSeparatorProps,
     prevState: ItemWithSeparatorState,
-  ): ?ItemWithSeparatorState  {
+  ): ?ItemWithSeparatorState {
     return {
       separatorProps: {
         ...prevState.separatorProps,
diff --git a/Libraries/ReactNative/YellowBox.js b/Libraries/ReactNative/YellowBox.js
index 5ad6311b73b638..01a4bd82dee617 100644
--- a/Libraries/ReactNative/YellowBox.js
+++ b/Libraries/ReactNative/YellowBox.js
@@ -424,13 +424,14 @@ class YellowBox extends React.Component<
     ];
     return (
       <View style={inspector ? styles.fullScreen : listStyle}>
-        {!inspector && rows.length > 0 && (
-          <TouchableHighlight
-            style={styles.dismissAllContainer}
-            onPress={() => this.dismissWarning(null)}>
-            <Text style={styles.dismissAll}>Dismiss All</Text>
-          </TouchableHighlight>
-        )}
+        {!inspector &&
+          rows.length > 0 && (
+            <TouchableHighlight
+              style={styles.dismissAllContainer}
+              onPress={() => this.dismissWarning(null)}>
+              <Text style={styles.dismissAll}>Dismiss All</Text>
+            </TouchableHighlight>
+          )}
         <ScrollView style={listStyle} scrollsToTop={false}>
           {rows}
         </ScrollView>
diff --git a/Libraries/StyleSheet/processTransform.js b/Libraries/StyleSheet/processTransform.js
index 9bcfd4f4b65e22..e9076493c2890e 100644
--- a/Libraries/StyleSheet/processTransform.js
+++ b/Libraries/StyleSheet/processTransform.js
@@ -133,7 +133,7 @@ function _multiplyTransform(
  */
 function _convertToRadians(value: string): number {
   const floatValue = parseFloat(value);
-  return value.indexOf('rad') > -1 ? floatValue : floatValue * Math.PI / 180;
+  return value.indexOf('rad') > -1 ? floatValue : (floatValue * Math.PI) / 180;
 }
 
 function _validateTransforms(transform: Array<Object>): void {
diff --git a/Libraries/Utilities/MatrixMath.js b/Libraries/Utilities/MatrixMath.js
index 6a523fa4a4a453..bb91c1d329181b 100755
--- a/Libraries/Utilities/MatrixMath.js
+++ b/Libraries/Utilities/MatrixMath.js
@@ -719,7 +719,7 @@ const MatrixMath = {
         0,
         0,
         MatrixMath.roundTo3Places(
-          Math.atan2(row[0][1], row[0][0]) * 180 / Math.PI,
+          (Math.atan2(row[0][1], row[0][0]) * 180) / Math.PI,
         ),
       ];
     } else {
diff --git a/Libraries/Utilities/__tests__/MatrixMath-test.js b/Libraries/Utilities/__tests__/MatrixMath-test.js
index 8a779d3676bf09..e70fbed91477e0 100644
--- a/Libraries/Utilities/__tests__/MatrixMath-test.js
+++ b/Libraries/Utilities/__tests__/MatrixMath-test.js
@@ -13,7 +13,7 @@
 const MatrixMath = require('MatrixMath');
 
 function degreesToRadians(degrees) {
-  return degrees * Math.PI / 180;
+  return (degrees * Math.PI) / 180;
 }
 
 function convertZeroes(degrees) {
diff --git a/Libraries/WebSocket/WebSocket.js b/Libraries/WebSocket/WebSocket.js
index 578d55e55d9c29..bef05b0d70e8cb 100644
--- a/Libraries/WebSocket/WebSocket.js
+++ b/Libraries/WebSocket/WebSocket.js
@@ -145,7 +145,12 @@ class WebSocket extends EventTarget(...WEBSOCKET_EVENTS) {
     this._eventEmitter = new NativeEventEmitter(WebSocketModule);
     this._socketId = nextWebSocketId++;
     this._registerEvents();
-    WebSocketModule.connect(url, protocols, {headers}, this._socketId);
+    WebSocketModule.connect(
+      url,
+      protocols,
+      {headers},
+      this._socketId,
+    );
   }
 
   get binaryType(): ?BinaryType {
diff --git a/RNTester/js/AlertExample.js b/RNTester/js/AlertExample.js
index 02382e769ebba1..b573356919d898 100644
--- a/RNTester/js/AlertExample.js
+++ b/RNTester/js/AlertExample.js
@@ -121,8 +121,9 @@ class SimpleAlertExampleBlock extends React.Component {
 class AlertExample extends React.Component {
   static title = 'Alert';
 
-  static description = 'Alerts display a concise and informative message ' +
-  'and prompt the user to make a decision.';
+  static description =
+    'Alerts display a concise and informative message ' +
+    'and prompt the user to make a decision.';
 
   render() {
     return (
diff --git a/RNTester/js/AnimatedGratuitousApp/AnExApp.js b/RNTester/js/AnimatedGratuitousApp/AnExApp.js
index 1ade55e2ffc8a9..5131f9641ca5d6 100644
--- a/RNTester/js/AnimatedGratuitousApp/AnExApp.js
+++ b/RNTester/js/AnimatedGratuitousApp/AnExApp.js
@@ -193,8 +193,9 @@ class Circle extends React.Component<any, any> {
 
 class AnExApp extends React.Component<any, any> {
   static title = 'Animated - Gratuitous App';
-  static description = 'Bunch of Animations - tap a circle to ' +
-  'open a view with more animations, or longPress and drag to reorder circles.';
+  static description =
+    'Bunch of Animations - tap a circle to ' +
+    'open a view with more animations, or longPress and drag to reorder circles.';
 
   _onMove: (position: Point) => void;
   constructor(props: any): void {
diff --git a/RNTester/js/DatePickerIOSExample.js b/RNTester/js/DatePickerIOSExample.js
index 5bd76259742ef4..ec338471d6937a 100644
--- a/RNTester/js/DatePickerIOSExample.js
+++ b/RNTester/js/DatePickerIOSExample.js
@@ -20,7 +20,7 @@ class DatePickerExample extends React.Component<
 > {
   static defaultProps = {
     date: new Date(),
-    timeZoneOffsetInHours: -1 * new Date().getTimezoneOffset() / 60,
+    timeZoneOffsetInHours: (-1 * new Date().getTimezoneOffset()) / 60,
   };
 
   state = {
diff --git a/RNTester/js/ImageExample.js b/RNTester/js/ImageExample.js
index 2125e2669e7267..5465b6608117ef 100644
--- a/RNTester/js/ImageExample.js
+++ b/RNTester/js/ImageExample.js
@@ -158,7 +158,7 @@ var NetworkImageExample = createReactClass({
         onProgress={e =>
           this.setState({
             progress: Math.round(
-              100 * e.nativeEvent.loaded / e.nativeEvent.total,
+              (100 * e.nativeEvent.loaded) / e.nativeEvent.total,
             ),
           })
         }
diff --git a/RNTester/js/InputAccessoryViewExample.js b/RNTester/js/InputAccessoryViewExample.js
index 45b63e20d9f5da..a848b961436e4e 100644
--- a/RNTester/js/InputAccessoryViewExample.js
+++ b/RNTester/js/InputAccessoryViewExample.js
@@ -60,7 +60,8 @@ class TextInputBar extends React.PureComponent<*, *> {
 
 class InputAccessoryViewExample extends React.Component<*> {
   static title = '<InputAccessoryView>';
-  static description = 'Example showing how to use an InputAccessoryView to build an iMessage-like sticky text input';
+  static description =
+    'Example showing how to use an InputAccessoryView to build an iMessage-like sticky text input';
 
   render() {
     return (
diff --git a/RNTester/js/KeyboardAvoidingViewExample.js b/RNTester/js/KeyboardAvoidingViewExample.js
index 2e51ed842016e9..0e86e432d79f58 100644
--- a/RNTester/js/KeyboardAvoidingViewExample.js
+++ b/RNTester/js/KeyboardAvoidingViewExample.js
@@ -27,7 +27,8 @@ const RNTesterPage = require('./RNTesterPage');
 
 class KeyboardAvoidingViewExample extends React.Component {
   static title = '<KeyboardAvoidingView>';
-  static description = 'Base component for views that automatically adjust their height or position to move out of the way of the keyboard.';
+  static description =
+    'Base component for views that automatically adjust their height or position to move out of the way of the keyboard.';
 
   state = {
     behavior: 'padding',
diff --git a/RNTester/js/ListExampleShared.js b/RNTester/js/ListExampleShared.js
index 0edb7fe181ad88..905985b52b28af 100644
--- a/RNTester/js/ListExampleShared.js
+++ b/RNTester/js/ListExampleShared.js
@@ -38,7 +38,7 @@ function genItemData(count: number, start: number = 0): Array<Item> {
     const itemHash = Math.abs(hashCode('Item ' + ii));
     dataBlob.push({
       title: 'Item ' + ii,
-      text: LOREM_IPSUM.substr(0, itemHash % 301 + 20),
+      text: LOREM_IPSUM.substr(0, (itemHash % 301) + 20),
       key: String(ii),
       pressed: false,
     });
diff --git a/RNTester/js/ListViewExample.js b/RNTester/js/ListViewExample.js
index 9e008dd400b713..a274c353949f59 100644
--- a/RNTester/js/ListViewExample.js
+++ b/RNTester/js/ListViewExample.js
@@ -70,7 +70,7 @@ var ListViewSimpleExample = createReactClass({
           <View style={styles.row}>
             <Image style={styles.thumb} source={imgSource} />
             <Text style={styles.text}>
-              {rowData + ' - ' + LOREM_IPSUM.substr(0, rowHash % 301 + 10)}
+              {rowData + ' - ' + LOREM_IPSUM.substr(0, (rowHash % 301) + 10)}
             </Text>
           </View>
         </View>
diff --git a/RNTester/js/MaskedViewExample.js b/RNTester/js/MaskedViewExample.js
index 081496b6f1b6d4..b944fbc16f7366 100644
--- a/RNTester/js/MaskedViewExample.js
+++ b/RNTester/js/MaskedViewExample.js
@@ -24,7 +24,8 @@ const {
 
 class MaskedViewExample extends React.Component<{}, $FlowFixMeState> {
   static title = '<MaskedViewIOS>';
-  static description = 'Renders the child view with a mask specified in the `renderMask` prop.';
+  static description =
+    'Renders the child view with a mask specified in the `renderMask` prop.';
 
   state = {
     alternateChildren: true,
diff --git a/RNTester/js/PickerExample.js b/RNTester/js/PickerExample.js
index 6026ac74eb4da4..0fd21fc7de32ea 100644
--- a/RNTester/js/PickerExample.js
+++ b/RNTester/js/PickerExample.js
@@ -22,7 +22,8 @@ const Item = Picker.Item;
 
 class PickerExample extends React.Component<{}, $FlowFixMeState> {
   static title = '<Picker>';
-  static description = 'Provides multiple options to choose from, using either a dropdown menu or a dialog.';
+  static description =
+    'Provides multiple options to choose from, using either a dropdown menu or a dialog.';
 
   state = {
     selected1: 'key1',
diff --git a/RNTester/js/RTLExample.js b/RNTester/js/RTLExample.js
index b833adfcbe3c27..bab56a1d36919a 100644
--- a/RNTester/js/RTLExample.js
+++ b/RNTester/js/RTLExample.js
@@ -373,7 +373,8 @@ const BorderExample = withRTLState(({isRTL, setRTL}) => {
 
 class RTLExample extends React.Component<any, State> {
   static title = 'RTLExample';
-  static description = 'Examples to show how to apply components to RTL layout.';
+  static description =
+    'Examples to show how to apply components to RTL layout.';
 
   _panResponder: Object;
 
diff --git a/RNTester/js/ScrollViewSimpleExample.js b/RNTester/js/ScrollViewSimpleExample.js
index 85c4147470d2b5..b7d95b2fb2f929 100644
--- a/RNTester/js/ScrollViewSimpleExample.js
+++ b/RNTester/js/ScrollViewSimpleExample.js
@@ -18,7 +18,8 @@ var NUM_ITEMS = 20;
 
 class ScrollViewSimpleExample extends React.Component<{}> {
   static title = '<ScrollView>';
-  static description = 'Component that enables scrolling through child components.';
+  static description =
+    'Component that enables scrolling through child components.';
 
   makeItems = (nItems: number, styles): Array<any> => {
     var items = [];
diff --git a/RNTester/js/SwipeableListViewExample.js b/RNTester/js/SwipeableListViewExample.js
index 1fec55d93e43fa..ee359ed1fcf6d9 100644
--- a/RNTester/js/SwipeableListViewExample.js
+++ b/RNTester/js/SwipeableListViewExample.js
@@ -94,7 +94,7 @@ var SwipeableListViewSimpleExample = createReactClass({
           <View style={styles.row}>
             <Image style={styles.thumb} source={imgSource} />
             <Text style={styles.text}>
-              {rowData.id + ' - ' + LOREM_IPSUM.substr(0, rowHash % 301 + 10)}
+              {rowData.id + ' - ' + LOREM_IPSUM.substr(0, (rowHash % 301) + 10)}
             </Text>
           </View>
         </View>
diff --git a/RNTester/js/ToastAndroidExample.android.js b/RNTester/js/ToastAndroidExample.android.js
index 7274fa969cf13a..80ea97715ba30b 100644
--- a/RNTester/js/ToastAndroidExample.android.js
+++ b/RNTester/js/ToastAndroidExample.android.js
@@ -19,7 +19,8 @@ var RNTesterPage = require('RNTesterPage');
 
 class ToastExample extends React.Component<{}, $FlowFixMeState> {
   static title = 'Toast Example';
-  static description = 'Example that demonstrates the use of an Android Toast to provide feedback.';
+  static description =
+    'Example that demonstrates the use of an Android Toast to provide feedback.';
   state = {};
 
   render() {
diff --git a/RNTester/js/ViewPagerAndroidExample.android.js b/RNTester/js/ViewPagerAndroidExample.android.js
index 1eb60ad3d6c681..f4aaca4a098411 100644
--- a/RNTester/js/ViewPagerAndroidExample.android.js
+++ b/RNTester/js/ViewPagerAndroidExample.android.js
@@ -81,7 +81,7 @@ class ProgressBar extends React.Component {
   render() {
     var fractionalPosition =
       this.props.progress.position + this.props.progress.offset;
-    var progressBarSize = fractionalPosition / (PAGES - 1) * this.props.size;
+    var progressBarSize = (fractionalPosition / (PAGES - 1)) * this.props.size;
     return (
       <View style={[styles.progressBarContainer, {width: this.props.size}]}>
         <View style={[styles.progressBar, {width: progressBarSize}]} />
@@ -92,7 +92,8 @@ class ProgressBar extends React.Component {
 
 class ViewPagerAndroidExample extends React.Component {
   static title = '<ViewPagerAndroid>';
-  static description = 'Container that allows to flip left and right between child views.';
+  static description =
+    'Container that allows to flip left and right between child views.';
 
   state = {
     page: 0,
diff --git a/local-cli/bundle/saveAssets.js b/local-cli/bundle/saveAssets.js
index b069c332b48d0a..0961ed7d525d00 100644
--- a/local-cli/bundle/saveAssets.js
+++ b/local-cli/bundle/saveAssets.js
@@ -75,8 +75,7 @@ function copy(src, dest, callback) {
     if (err) {
       return callback(err);
     }
-    fs
-      .createReadStream(src)
+    fs.createReadStream(src)
       .pipe(fs.createWriteStream(dest))
       .on('finish', callback);
   });
diff --git a/local-cli/link/android/patches/makeBuildPatch.js b/local-cli/link/android/patches/makeBuildPatch.js
index 1ee9fb7d5fc65e..dfaab8f6998bfe 100644
--- a/local-cli/link/android/patches/makeBuildPatch.js
+++ b/local-cli/link/android/patches/makeBuildPatch.js
@@ -18,6 +18,6 @@ module.exports = function makeBuildPatch(name) {
   return {
     installPattern,
     pattern: /[^ \t]dependencies {(\r\n|\n)/,
-    patch: `    compile project(':${normalizedProjectName}')\n`
+    patch: `    compile project(':${normalizedProjectName}')\n`,
   };
 };
diff --git a/package.json b/package.json
index 9eb0e2bb55602f..f36d371e663014 100644
--- a/package.json
+++ b/package.json
@@ -215,7 +215,7 @@
     "flow-bin": "^0.73.0",
     "jest": "23.1.0",
     "jest-junit": "4.0.0",
-    "prettier": "1.12.1",
+    "prettier": "1.13.4",
     "react": "16.3.2",
     "react-test-renderer": "16.3.2",
     "shelljs": "^0.7.8",