The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?  Choose the correct choice
A) 78 2/11%  B) 18 2/11%  C) 58 2/11%  D) 18 2/11%  E) 68 2/11%
Explanation:   13 CP = 11 SP   11 --- 2 CP   100 --- ? =&gt;18 2/11%   Answer:18 2/11%
<result>B</result>
The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?