A man buys an article for $20. and sells it for $35. Find the gain percent?
Choose the correct choice from the following choices
A) 25 %	B) 50 %	C) 20 %	D) 75 %	E) 30 %

Rationale: "c . p . = $ 20 s . p . = $ 35 gain = $ 15 gain % = 15 / 20 * 100 = 75 % answer is d"
Answer: D