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

A student multiplied a number by

3	instead of	5	.
5		3

What is the percentage error in the calculation?

Answer: Option D

Explanation:

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