Question

The selling price of 15 pens is equal to
the cost price of 12 pens. What is the loss per cent?​

Answer 1

Answer:

so, CP of 1 pen = x/12. so, CP of 15 pens = 15x/12 = 5x/4. As, 5x/4 > x, so, there will be loss. Loss% = [{(5x/4)-x) / 5x/4] x 100 = 1/5 x100 = 20%

Answer 2

Answer:

CP of 1 pen = x/12. so, CP of 15 pens = 15x/12 = 5x/4. As, 5x/4 > x, so, there will be loss. Loss% = [{(5x/4)-x) / 5x/4] x 100 = 1/5 x100 = 20%.