In a certain store, the profit is 320% 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?

A 30%

B 70%

C 100%

D 250%

Correct Answer: Option B

Let,

C.P.= 100 TK Then, Profit = 320 TK S.P. = 420 TK

New C.P. = 125% of 100 TK = 125 TK New S.P. = 420 TK

Profit = Rs. (420 - 125) = 295 TK

Required percentage = (295/420) * 100 = 70%(approx)