Question

If selling price of five pens is equal to the cost of four pens ,the gain or loss percent is.

Answer 1

the answer is that he loss by selling the pens at the cost of four pens

example: cost of four pens is 4rupees and the selling price of 5pens is also 4rupees if 1 pen is of 1rupee then the seling price of 5 pens should be 5rupees but it is 4rupees