Question

On selling a pendrive for Rs 708.50, a man gains 9%. For how much should he sell it to gain 11%?

Answer 1

Let's assume that the cost price was C
now according to the question
C + (9/100)C = 708.50
C(109/100) = 708.50
C = 708.50/1.09
C = 650

Now for 11%profit
S= (111/100)C
S= 721.5

He must sell it in Rs721.5 to gain 11% profit.