The C.P of 15 books is equal to the S.P of 18 books. Find his gain% or loss%?	Choose the correct choice from the following options:
A) 16 2/3% loss	B) 16 7/3% loss	C) 16 2/8% loss	D) 17 2/3% loss	E) 13 2/3% loss
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%?