Percentage - General Aptitude

A student multiplied a number by 3 instead of 5 .

5 3

What is the percentage error in the calculation?

A 34%

B 44%

C 54%

D 64%

ANS:D - 64%

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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