A watch becomes fast by 5 minutes everyday. By what percent does it become fast ?

Answer: Option D

Number of minutes in a day
= (24 × 60) = 1440
∴ Required percentage
$$\begin{array}{rl}& =\left(\frac{5}{1440}\times 100\right)\%\\ & =\frac{50}{144}\%\end{array}$$