By selling an article for $225 a person gains $75. What is the gain %?	Choose the correct option:	A) 25 %	B) 30 %	C) 50 %	D) 20 %	E) 10 %

Rationale: "s . p . = $ 225 gain = $ 75 c . p . = 225 - 75 = 150 gain % = 75 / 150 * 100 = 50 % answer is c"
Answer: C