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?  Select:
A) 8789
B) 7500
C) 8392
D) 8390
E) 2804
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: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?