The C.P of 15 books is equal to the S.P of 18 books. Find his gain% or loss%? Select:
A) 16 2/3% loss  B) 11 2/3% loss  C) 66 2/3% loss  D) 12 2/3% loss  E) 17 2/3% loss
Explanation:   15 CP = 18 SP   18 --- 3 CP loss   100 --- ? =&gt; 16 2/3% loss   16 2/3% lossnswer: 16 2/3% loss
<result>A</result>
The C.P of 15 books is equal to the S.P of 18 books. Find his gain% or loss%?