The price of an article is reduced by 25\%. In order to retain the original price, the present price has to be increased by
(a)20\%
(b)25\%
(c)$33 \frac{1}{3} \%$
(d)50\%
Answer
Answer (as printed): C
Explanation
Let original price $=₹ 100$. New price $=₹ 75$. Increase on $75=25$. Increase on 100 $$=\left(\frac{25}{75} \times 100\right) \%=\frac{100}{3} \%=33 \frac{1}{3} \% .$$
Explanation as extracted from the printed page; notation may be imperfect.