Geetha earns Rs.12000 a month, out of which she saves Rs.3000. Find the ratio of her expenditure to her income.
Money earned,E=Rs.12000
Money saved, S=Rs.3000
Expenditure, Ex=E−S
=12000−3000
=Rs. 9000
Ratio=Ex:E
=9000:12000 = 900012000
=3×30004×3000=34=3:4