The ratio of the cost price and selling price is 2:3. The profit percent is?  Select the correct option:  A) 20 %  B) 25 %  C) 50 %  D) 75 %  E) 100 %

Rationale: let the c . p . = $ 2 x then s . p . = $ 3 x then , gain = 3 x - 2 x = $ x gain % = x / 2 x * 100 = 50 % answer is c
Answer: C