Question

A trader marks his goods 40% above the c.p. He sells them at a discount of 5%. What is his loss or gain%?

Answer 1

let cp be x
mp = cp + 40/100*cp  ( given)
= x + 40/100*x
= 140x/100
discount % = 5%
sp = 140x/100 - 5/100*140x/100 = 140x/100 - 7x/10
                                                    =  7x/10
as cp is greater than sp( 10x/10 > 7x/10)
loss = 10x/10 - 7x/10
        = 3x/10
loss% = 3x/10 /x *100
= 3x/10 * 1/x *100
= 3/10 * 100
= 30%