A. 20%
B. 30%
C. 50%
D. 70%
Let C.P = Rs. 100. Then, Profit = Rs. 320, S.P = Rs. 420
New C.P = 125% of Rs. 100 = Rs. 125
New S.P = Rs. 420
Profit = Rs. (420 - 125) = Rs. 295
=> Required Percentage = (295 / 420) x 100 % = (1475 / 21) % = 70% approx