Question

A man bought bananas at the rate of 10 for Rs 15 and sold at the rate of one dozen bananas for Rs 15 .Find his gain or loss per cent.

Answer 1

let there be 60 bananas because the number is divisible by 10 and 12 both
cost price is equal to 90 and selling price is equal to 75
so he got a loss of rupees 50 on 90
that makes 55.56%