In a certain store, the profit is 300% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
Choose the correct choice from the following choices:
A) 65% B) 66.7% C) 68.75% D) 70% E) 71.2%
Let C.P.= Rs. 100. Then, Profit = Rs. 300, S.P. = Rs. 400.   New C.P. = 125% of Rs. 100 = Rs. 125   New S.P. = Rs. 400.   Profit = Rs. (400 - 125) = Rs. 275.   Required % =(275/400)x100 %   = 68.75%   ANSWER :68.75%
<result>C</result>
In a certain store, the profit is 300% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?