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  • A student multiplied a number by $3 / 5$ instead of $5 / 3$, What is the percentage error in the calculation?Option: 1 54%<div class='q

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

Option: 1

54%


Option: 2

64%


Option: 3

74%


Option: 4

84%


Answers (1)

best_answer

Let original number be $\mathrm{x}$

Correct number after multiplication $=5 \mathrm{x} / 3$

Incorrect number after multiplication $=3 \mathrm{x} / 5$

Error $=(5 / 3-3 / 5) x=16 x / 15$

Error $\%=[(16 \mathrm{x} / 15) /(5 \mathrm{x} / 3)] * 100=64 \%$

Posted by

Irshad Anwar

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