Question

By selling 99 pens a trader gains the cost of 33 pens.Find his gain percentage

Answer 1

Gain percentage = gain*100/sell pens

= 33 * 100/99

= 33 1/3%

Hope this helps!

Answer 2

Answer:

Let 33 pens=x

Thus,  

99 pens=3x

When you sell 3x, you gain x.

So, C.P.=S.P. - Gain

= 3x - 2x   \\  = x

Thus gain %

=  \frac{x}{2x}  \times 100 \\  =  \frac{1}{2}  \times 100 \\  = 50\%

Hope it helps

Step-by-step explanation: