A dealer purchases 15 articles for Rs. 25 and sells 12 articles for Rs. 30. Find the profit percentage?  Choose the correct choice from the following options:
A) 60%  B) 50%  C) 80%  D) 70%  E) 53%
L.C.M of 15 and 12 = 60   CP of 60 articles = Rs. 100 (25 * 4)   SP of 60 articles = Rs. 150 (30 * 5)   Profit percentage = (150 - 100)/100 * 100= 
<gadget id="calculator">(150 - 100)/100 * 100</gadget>
<output>50</output>
50%   Answer: 50%
<result>B</result>
A dealer purchases 15 articles for Rs. 25 and sells 12 articles for Rs. 30. Find the profit percentage?