The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?  Choose the correct choice from the following answers:	A) 18 2/61%	B) 18 2/11%	C) 18 2/81%	D) 18 2/12%	E) 18 2/21%
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?