Question

The C.P. of 20 pens equals the S.P. of 16 pens. What is the gain percentage in the whole transaction?

Answer 1

Let 16 pens cost Rs.100. Hence 1 pen will cost 100/16.

SP of 12 pens = Rs.100. Hence SP of 1 pen = 100/12

Profit = 100/12 - 100/16= 800-600/96 or 200/96

Or 25/12.

Proit % = profit ÷ cp x 100 = 25/12 × 16/100 x100

= 100/3 or 33.33%