A student multiplied a number by 3 instead of 5 .

Question

A student multiplied a number by 3 instead of 5 . 5 3

What is the percentage error in the calculation?

Options:

A . 34%

B . 44%

C . 54%

D . 64%

Answer: Option D

Let the number be x.

Then, error = 5 x - 3 x = 16 x. 3 5 15

Error% = 16x x 3 x 100 % = 64%. 15 5x

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