Consider a watch becomes fast by 10 minutes everyday. By what percent does it become fast?

$\frac{5}{12}%$ $\frac{1}{6}%$ $\frac{25}{36}%$ 2.5%

$\frac{25}{36}%$

Total minutes in one day = 24 × 60 = 1440 min As the clock gains 10 min, so required percentage = $\frac{10}{1440}×100=\frac{25}{36}%$