The ratio of the cost price and the selling price is 4:5. The profit percent is:  Select the correct option:
A) 67%
B) 45%
C) 25%
D) 70%
E) 50%
C   C.P. = Rs. 4x. Then, S.P. = Rs. 5x   Gain = (5x - 4x) = Rs. x   Gain % = (x * 100)/ 4x = 25%.
<result>C</result>
The ratio of the cost price and the selling price is 4:5. The profit percent is: