The C.P of 10 pencils is equal to the S.P of 12 pencils. Find his gain % or loss%? Choose the most appropriate option.
A) 18 2/3%  B) 58 2/3%  C) 16 2/3%  D) 46 2/3%  E) 6 2/3%
Option 16 2/3%   Explanation:   10 16 2/3%P = 12 SP   12 --- 2 16 2/3%P loss   100 --- ? =&gt; 16 2/3%
<result>C</result>
The C.P of 10 pencils is equal to the S.P of 12 pencils. Find his gain % or loss%?