# Arithmetic Aptitude :: Percentage

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## 7. A student multiplied a number by 3/5 instead of 5/3. What is the percentage error in the calculation?

**Answer:**

**Option D**

**Explanation :**

Let the number be x.

Then, error = x*5/3 - x*3/5 = x * 16/15

So Error% = ( x*16/15 * 3/5x * 100)% = 64%.

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nagarro

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