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

34%
44%
54%
64%

Correct Answer: 64%

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

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