Question

a man bought bananas at the rate 10 for rs 15 and sold at the rate of one dozen bananas fot rs 15 . find his gain and loss percentage

Answer 1

For 10 is 15
for 1 is 15/10
1.5rs
now
1.5 X 12
18rs
Loss of 3rs
Loss% = Difference/Original X 100
=
$3 \div 15 \times 100$
Answer is 20%