If the cost price of 30 articles is equal to the selling price of 45 articles, what is the % profit or loss made by the merchant?
Choose the most appropriate option
A) 33.33% loss
B) 25% profit
C) 20% loss
D) 20% profit
E) 5% profit
Let the cost price of 1 article be $1.   Therefore, cost price of 30 articles = 30 * 1= 
<gadget id="calculator">30 * 1</gadget>
<output>30</output>
$30   The selling price of 45 articles= cost price of 30 articles = $30.   Now, we know the selling price of 45 articles. Let us find the cost price of 45 articles.   Cost price of 45 articles = 45 * 1= 
<gadget id="calculator">45 * 1</gadget>
<output>45</output>
$45.   Therefore, profit made on sale of 45 articles= Selling price of 45 articles - cost price of 45 articles   = 30 - 45 = -$15.   As the profit is in the negative, the merchant has made a loss of $15.   Therefore, % loss = loss/cp * 100   % loss = -15/45 * 100 = 33.33% loss.   33.33% loss
<result>A</result>
If the cost price of 30 articles is equal to the selling price of 45 articles, what is the % profit or loss made by the merchant?