The C.P of 10 pens is equal to the S.P of 16 pens. Find his gain % or loss%?  Choose the correct choice
A) loss 16 2/8% B) loss 16 6/3% C) loss 16 2/3% D) loss 18 2/3% E) loss 37.5%
10 CP = 16 SP   16 --- 6 CP loss   100 --- ? =&gt; 37.5% loss   Answer:loss 37.5%
<result>E</result>
The C.P of 10 pens is equal to the S.P of 16 pens. Find his gain % or loss%?