Question

A fruit seller bought bananas at the rate of Rs. 45/- per dozen and sold them at the rate of Rs . 45/- per 10 bananas. find his gain or loss percentage .

Answer 1

cp of 12 bananas= 45
sp of 12 bananas = 4.5*12=54
so it will a a gain of 9 rupees
gain% = 9/45*100= 20%

Answer 2

dozen= 12 banana

cost price of 12 banana =45

cost price of 1 banana = 45/12=3.75

selling price of 10 banana = 45

selling price of 1 banana = 45/10= 4.5.

so here selling price of one banana is more than the cost price of 1 banana so it should be gain .

gain= selling price - cost price

4.5 - 3.75 = 0.75

gain% = gain/cp * 100 = 0.75/3.75*100= 20%

gain% = 20% .