A man buys an article for $100. and sells it for $115. Find the gain percent? Choose the correct option:	A) 10 %	B) 15 %	C) 25 %	D) 20 %	E) 30 %

Rationale: "c . p . = $ 100 s . p . = $ 115 gain = $ 15 gain % = 15 / 100 * 100 = 25 % answer is b"
Answer: B