Give stream of consciousness and then the final answer. If the cost price of 50 articles is equal to the selling price of 20 articles, then the gain or loss percent is?
Options:
(A) 16
(B) 127
(C) 12
(D) 18
(E) 150

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Percentage of profit = 30/20 * 100 = 150%
The final answer: (E).