A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 36.
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Understanding |
Application |
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A student multiplied a number by 4/5 instead of 5/4. |
Suppose the number = 20 So, After error, number = 20 × 4/5 = 16 And Correct answer = 20 × 5/4 = 25 Hence, Percentage error = [(25 – 16)/25] × 100 = 36% |