Question

Navneet spends 4/9 of his money but still he has Rs 45 left how much did he spend

Answer 1

Let x be the total money
so he spend=4/9×x
so the total money left=45
therefore
4/9x+45=x
4x+405=9x
5x=405
x=81
therefore he spend=4/9(81)
Rs.36

Answer 2

Let the money Navneeth has Rsx
Amount he spent =4/9x
Remaining amount after he spent =Rs45
x-4x/9=45
(9x-4x)/9=45
5x/9=45
x= (45*9)/5
x=9*9=81
Therefore
Money Navneeth spent = 4x/9
=Rs(4*81/9)
=4*9
=36