John bought 15 apples for Rs.10 and sold them at the rate of 12 apples for Rs.12. What is the percentage of profit made by him?
Choose one:
A) 50 %  B) 60 %  C) 65 %  D) 100 %  E) None
Profit % = 15/10 * 12/12= 
<gadget id="calculator">15/10 * 12/12</gadget>
<output>3/2 = around 1.5</output>
1.5 ⇒ 50%.   50 %nswer 50 %
<result>A</result>
John bought 15 apples for Rs.10 and sold them at the rate of 12 apples for Rs.12. What is the percentage of profit made by him?