Question

A number x is mistakenly divided by 10 instead of being multiplied by 10. what is the percentage error in the result?

A.-0.99

B.-1

C.+99%

D.+100%

Answer 1

Number =X
Divide by =10
=X/10

Instead of

Multiplied by 10
=10x

Difference Between two answer
10x-x/10
=100x-x/10
=99x/10
$percentage \: of \: error \\ = \frac{difference}{correct \: answer} \times 100 \\ \frac{99x}{10} \times \frac{1}{10x} \times 100 \\ = 99\%$
Answer will be=C.+99%
Answer=99%