The ratio of the cost price and the selling price is 4 : 5.The profit percent is :  Select:	A) 10%	B) 20%	C) 25%	D) 30%	E) 35%
Solution   Let C.P. = Rs.4x. Then, S.P. = Rs.5x. Gain = Rs.(5x - 4x) = Rs.x.   ∴ Gain % =(x/4x X100) % = 25 %   Answer 25%
<result>C</result>
The ratio of the cost price and the selling price is 4 : 5.The profit percent is :