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## Practice Test Discussion

Q)

Ravi completes $\frac{1}{5}$th an assignment in 1 day. Calculate his efficiency percentage?

• Explanation

According to the formula, if a person can do $\frac{1}{x}$th work in 1 days, then his efficency in percentage is $\frac{100}{\mathrm{x}}{%}$.

Similarly here, Ravi can complete $\frac{1}{5}$th of an assignment in 1 day.

So, his efficiency in percentage is $\frac{100}{5}{=}{20}{%}$

Hence option B is correct

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