The ratio of the cost price and the selling price is 4:5. The profit percent is? Choose one:
A) 75%.  B) 27%.  C) 25%.  D) 45%.  E) 15%.
Let C.P. = Rs. 4x. Then, S.P. = Rs. 5x   Gain = (5x - 4x) = Rs. x   Gain % = (x * 100)/ 4x = 25%.   Answer:25%.
<result>C</result>
The ratio of the cost price and the selling price is 4:5. The profit percent is?