Question

A vendor purchase bananas at rupees 40 per derzen and sold them at 10 for rupees 36 find his gain or loss percent

Answer 1

cost of 12 banana=40
cost of 1 banana=40/12

s.p of 10 banana=36
s.p of 1 banana=36/10

loss =c.p-s p
=3.6-3.3333
= 0.3

loss percent= loss/c.p×100

keep c.p as 40/12 or 3.3 and find your answer

Answer 2

1 derzon =40 Rs
cost of one banana =12/40
sp of 10 bananas = 36
sp of 1 banana = 36/10
loss = sp -cp
we have to do all that equation and the answer will be 0.3
loss percent =loss /cp *100
cp= 40/12 and u will get ur answer!
Hope it helps u!!