Question

A boy buys 9 oranges for 16 while sells them at 11 oranges for 20 what is gain percent

Answer 1

CP for one = 16/9
SP for one =20/11
gain=Sp-cp
= (in photo)
gain%= 25%

Answer 2

Cost price of 9 oranges = ₹ 16

Cost price of 11 oranges=₹16/9

Cost of 11 oranges=₹16/19×11

                              = 176/9

Profit=sp-cp

       = 20-176/9

        =4/9

Profit%= profit/cost price×100

4/9/176/9×100

= 4/9×9/176×100

= 25/11