If the cost price of 20 articles is equal to the selling price of 15 articles, what is the % profit or loss made by the merchant?  Choose the correct choice from the following answers:
A) 25 % loss B) 33.33 % profit C) 20 % loss D) 20 % profit E) 5 % profit

Rationale: "let the cost price of 1 article be $ 1 . therefore , cost price of 20 articles = 20 * 1 = $ 20 the selling price of 15 articles = cost price of 20 articles = $ 15 . now , we know the selling price of 15 articles . let us find the cost price of 15 articles . cost price of 15 articles = 15 * 1 = $ 15 . therefore , profit made on sale of 15 articles = selling price of 15 articles - cost price of 15 articles = 20 - 15 = $ 5 . as the profit is in the positive , the merchant has made a profit of $ 5 . therefore , % loss = loss / cp * 100 % loss = 5 / 15 * 100 = 33.33 % profit . b"
Answer: B