The ratio of the cost price and the selling price is 4:5. The profit percent is?
Select
A) 17	B) 56	C) 25	D) 28	E) 12

Rationale: "let 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"
Answer: C