Given the following reasoning and answer, what was the question? Percentage of profit = 20/30 * 100 = 67%
 The answer: (E)
The question If the cost price of 50 articles is equal to the selling price of 30 articles, then the gain or loss percent is?
Options:
(A) 16
(B) 127
(C) 12
(D) 18
(E) 67