By selling an article for $195, a person gains $45. What is the gain %?	Choose the correct choice from the following choices
A) 25 %	B) 30 %	C) 50 %	D) 20 %	E) 10 %

Rationale: s . p . = $ 195 gain = $ 45 c . p . = 195 - 45 = 150 gain % = 45 / 150 * 100 % = 30 % answer is b
Answer: B