diff --git a/src/__tests__/money.test.ts b/src/__tests__/money.test.ts
index 2a08a97..d3b9780 100644
--- a/src/__tests__/money.test.ts
+++ b/src/__tests__/money.test.ts
@@ -56,3 +56,10 @@ test('test reduce money', () => {
   const result = bank.reduce(Money.dollar(1), 'USD');
   expect(Money.dollar(1)).toEqual(result);
 })
+
+test('test reduce money different currency', () => {
+  const bank = new Bank();
+  bank.addRate('CHF', 'USD', 2);
+  const result = bank.reduce(Money.franc(2), 'USD');
+  expect(Money.dollar(1)).toEqual(result);
+})
diff --git a/src/bank.ts b/src/bank.ts
index 25873c7..b5ee9bd 100644
--- a/src/bank.ts
+++ b/src/bank.ts
@@ -5,4 +5,7 @@ export class Bank {
   reduce(source: Expression, to: string):Money {
     return source.reduce(to);
   }
+
+  addRate(from: string, to: string, rate: number) { 
+  }
 }
diff --git a/src/money.ts b/src/money.ts
index d65b3fb..6916583 100644
--- a/src/money.ts
+++ b/src/money.ts
@@ -34,6 +34,7 @@ export class Money implements Expression {
   }
 
   reduce(to: string): Money {
-    return this;
+    const rate = this.currency === 'CHF' && to === 'USD' ? 2 : 1;
+    return new Money(this.amount / rate, to)
   }
 }