Raman bought a camera and paid 20% less than its original price. He sold it at 40% profit on the price he had paid. The percentage of profit earned by Raman on the original price was -

Answer: Option A

Let the original price of the camera be Rs. 100.
Discounted price = Rs. 80
Profit = 40%
∴ S.P. = 140% of Rs. 80
$$\begin{array}{rl}& \text{ = Rs}\text{.}\left(\frac{140}{100}\times 80\right)\\ & =\text{Rs}\text{.112}\text{.}\end{array}$$
So, profit percentage on original price = (112 - 100)% = 12%