The ratio of the cost price and the selling price is 4:5. The profit percent is:__________?

The ratio of the cost price and the selling price is 4:5. The profit percent is:__________?

A. 10%
B. 20%
C. 25%
D. 30%
Explanation:
Let C.P. = Rs. 4x. Then, S.P. = Rs. 5x
Gain = (5x – 4x) = Rs. x
Gain % = (x * 100)/ 4x = 25%.