Question

plastic buttons are bought for 11 for 10rs. and sold for 10 for 11rs. What is the profit or loss percentage

Answer 1

cost price of each button is 10/11
selling price of each button is 11/10
profit on one button is( 121-100)/110
=21/110
profit on total buttons sold is 10*21/110
=21/11
p%=p/cp *100
=(21/11)/(10/11).10 * 100
=21*100/100
=21%
hence the profit percentage is 21%

hope this helps you

Answer 2

Answer:

c.p of 11 buttom is rs 10

c.p of 1 buttom is 9.9

s.p of 10 button is rs 11

s.p of 11 buttom are 12.1

profit=sp-cp

12.1-9.9

=2.2

profit%=profit×100÷c.p

=2.2×100÷9.9

=22×10×100÷99×10

=2200÷99

=22.2