Quantitative Aptitude :: Percentage - Discussion

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

A34%

B44%

C54%

D64%

Answer: Option (Login/Signup)

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SHORTCUT

Nagaraja
11 Dec, 2018 3:43 PM

TO FIND ERROR 2 STEPS

1) DIFFERENCE = TRUE VALUE- FALSE VALUE I.E, 5/3-3/5=16/5.

2)ERROR % = DIFFERENCE/TRUE VALUE MULTIPLIED BY 100

(16/5)/(5/3) x 100 =16/5 X 3/5 X 100 =64

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