If selling price is doubled, the profit triples. Find the profit percent?	Choose the correct answer:
A) 100%
B) 110%
C) 120%
D) 140%
E) 150%
Let C.P. be Rs. x and S.P. be Rs. y.   Then, 3(y - x) = (2y - x) y = 2x.   Profit = Rs. (y - x) = Rs. (2x - x) = Rs. x.   Profit % = x/x	x 100	% = 100%   100%)
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If selling price is doubled, the profit triples. Find the profit percent?