The C.P of 20 pens is equal to the S.P of 22 pens. Find his gain % or loss%?
Choose the correct choice from the following:
A) 6 2/11%
B) 7 2/11%
C) 9 1/11%
D) 8 1/11%
E) 10 1/11%
20 9 1/11%P = 22 SP   22 --- 2 9 1/11%P loss   100 --- ? =&gt; 9 1/11%   Answer: 9 1/11%
<result>C</result>
The C.P of 20 pens is equal to the S.P of 22 pens. Find his gain % or loss%?