A man gains 20% by selling an article for a certain price. If the sells it at double the price, the percentage of profit will be?  Pick:
A) 76%.  B) 66%.  C) 89%.  D) 140%.  E) 91%.
Let C.P. = Rs. x.   Then, S.P. = Rs. (12% of x) = Rs. 6x/5   New S.P. = 2 * 6x/5 = Rs. 12x/5   Profit = 12x/5 - x = Rs. 7x/5   Profit = 7x/5 * 1/x * 100 = 140%.   Answer: 140%.
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A man gains 20% by selling an article for a certain price. If the sells it at double the price, the percentage of profit will be?