Question

Varun saves 20% of his monthly income. After six months, he finds that he has rs10800 as his savings. Find the monthly income.

Answer 1

Let his monthly income be x.


Given that After six months he has 10800.

                     1 month = 10800/6

                                        = 1800.

Now, 20% of x = 1800

x * 20/100 = 1800

x = 1800 * 100/20

   = 9000.

His monthly income = 9000.


Hope this helps!

Answer 2

ok 
here's the answer
Varun saves 20% of his income in 1 month,
so he will save 20*6 = 120% in 6 months
next substitute this in this formula:(let x be his monthly income)
120x/100=10,800 (given condition)  
x=10,800 *  100/120
canceling zeroes and canceling 10800 with 120, the answer is 9,000


hope this helps :)