The ratio of the cost price and the selling price is 4 : 5.The profit percent is :	Choose the correct choice from the following
A) 67 %
B) 45 %
C) 25 %
D) 70 %
E) 50 %

Rationale: "c c . p . = rs . 4 x . then , s . p . = rs . 5 x gain = ( 5 x - 4 x ) = rs . x gain % = ( x * 100 ) / 4 x = 25 % ."
Answer: C