Question

by selling 35 greeting cards A shopkeeper loses an amount equal to the selling price of 5 greeting cards find his loss percent

Answer 1

let 1 greeting card costs 1 rupee
then his loss = 4 rup.
selling price = 35 rup.
so total cost price(C.P.)will be 35+5=40 rup.
so loss ℅ = (loss × 100)/C.P.
= (5×100)/40
loss ℅ = 12.5%