A book was purchased for Rs. 1,020 and sold for Rs. 1,224. Find the profit percentage.

Correct option is D

Given:
Cost Price (CP) = 1020
Selling Price (SP) = 1224
Formula Used:
$$\text{Profit \%} = \frac{\text{Profit}}{\text{CP}} \times 100$$​
Solution:

$$\text{Profit} = 1224 - 1020 = 204\\\ \\\text{Profit \%} = \frac{204}{1020} \times 100\\\ \\\text{Profit \%} = 20\%$$​​