diff --git a/src/__tests__/index.js b/src/__tests__/index.js
index 58906fe..82fe48a 100644
--- a/src/__tests__/index.js
+++ b/src/__tests__/index.js
@@ -730,3 +730,17 @@ test(
   'calc(100% - calc(10px - 2vw))',
   'calc(100% - 10px + 2vw)',
 );
+
+test(
+  'precision for calc',
+  testValue,
+  'calc(100% / 3 * 3)',
+  '100%',
+);
+
+test(
+  'precision for nested calc',
+  testValue,
+  'calc(calc(100% / 3) * 3)',
+  '100%',
+);
diff --git a/src/lib/transform.js b/src/lib/transform.js
index b7a5548..09bad39 100644
--- a/src/lib/transform.js
+++ b/src/lib/transform.js
@@ -34,7 +34,8 @@ function transformValue(value, options, result, item) {
       result,
       item);
 
-  }, true).toString();
+    return false;
+  }).toString();
 }
 
 function transformSelector(value, options, result, item) {