Mohan's salary was first increased by 20% and then decreased by 20%. If his present salary is Rs. 7200, then what was his original salary? Choose one.
A) Rs. 8000 B) Rs. 7500 C) Rs. 7400 D) Rs. 7200 E) None of these
Let Mohan's salary be Rs.100.   When increased by 20%, Mohan's salary = Rs.120   Again when decreased by 20%, Mohan's salary = 120 - 24 = Rs. 96.   But present salary is Rs. 7200   for, 96 ---&gt; 100 ; 7200 ---&gt; ?   Required salary is 7200/96 * 100 = Rs. 7500   ANSWER:Rs. 7500
<result>B</result>
Mohan's salary was first increased by 20% and then decreased by 20%. If his present salary is Rs. 7200, then what was his original salary?