A shopkeeper sold an article offering a discount of 5% and earned a profit of 21.6%. What would have been the percentage of profit earned if no discount was offered?  Choose one:
A) 60%
B) 28%
C) 30%
D) 56%
E) 73%
Let C.P. be Rs. 100.   Then, S.P. = Rs. 121.60   Let marked price be Rs. x. Then, 95/100 x = 121.60   x = 12160/95 = Rs. 128   Now, S.P. = Rs. 128, C.P. = Rs. 100   Profit % = 28%.   Answer: 28%
<result>B</result>
A shopkeeper sold an article offering a discount of 5% and earned a profit of 21.6%. What would have been the percentage of profit earned if no discount was offered?