Question

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

Answer 1

take out the cost price for 9% and then take the answer as your cost price and 11%as the gain percentage and then fine selling price

Answer 2

lets assume that the cost price was c

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=721.50