Question

a man buys toffees at 10 for rupees 3 and sells them at 8 for rupees 3 find ; his gain percent.​

Answer 1

10 toffees for rs 3

CP of 1 toffee is rs 3/10

SP of 8 toffees is Rs 3

.....1 toffee is 3/8

profit=3/8-3/10=15-12/40=3/40

profit %= 3/40×8/3×100=20%