By selling 50 pens, a shopkeeper lost an amount equal to the selling price of 10 pens. Find his loss percentage.
503 %
Let selling price of 1 pen be ₹x
Selling price of 50 pens is ₹50x
Loss = Selling price of 10 pens = ₹10x
Loss = C.P – S.P
10x = C.P – 50x
C.P = ₹60x
Loss%=lossC.P×100%
=(10x60x)×100%
=503%