Question

The cost price of 12 pens is equal to the selling price of 18 pens Find gain or loss percent​

Answer 1

Answer: 33.33 %

Step-by-step explanation:

Since the cost price of 12 pens = the selling price of 18 pens

and,

12 < 18

It will be a loss.

Loss percent = Loss / Cost price x 100 %

Loss = Cost price - Selling price

Lets say the cost price of one pen = x

Selling price = 12x/18

                      = 2x/3

Loss = x - 2x/3

        = (3x-2x)/3            (By taking LCM)

        = x/3

Loss percent = (x/3)/x    x    100 %

                      = x/3x    x      100 %

                      = 1/3 x 100 %                           (x and x get cancelled)

                      = 100/3 %

                      = 33.33... %                               (recurring decimal)

When writing on paper, write 33.3 and put a dash on top of the 3 after the decimal point.