The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent? Select the correct option:
A) 18 2/91%
B) 18 2/11%
C) 18 9/11%
D) 18 2/91%
E) 12 2/11%
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?