If the cost price of 50 articles is equal to the selling price of 30 articles, then the gain or loss percent is? Choose the correct choice from the following answers.
A) 16
B) 127
C) 12
D) 18
E) 67
Percentage of profit = 20/30 * 100 = 67%   Answer: 67
<result>E</result>
If the cost price of 50 articles is equal to the selling price of 30 articles, then the gain or loss percent is?