The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?  Choices:	A) 18 2/19%	B) 18 2/11%	C) 18 2/91%	D) 18 2/81%	E) 18 2/121%
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?