If the cost price is $25\%$ of selling price. Then what is the profit percent?

A. $200\%$
B. $250\%$
C. $150\%$
D. $300\%$

The correct option is D ($300\%$)

Let the selling price be $Rs.100$
Then, cost price $=25\%$ of $100$
$=\frac{25}{100}\times 100$
$=Rs.25$

Profit $=$ S.P $–$ C.P
$=100–25=Rs.75$
Profit percentage $=\frac{\text{Profit}}{\text{C.P}}\times 100$
$=\frac{75}{25}\times 100$
$=75\times 4$
$=300\%$