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Divide both the numerator and denominator by 9, we get

36 36 9 4 maths fun
÷
= =
45 45 9 5 Ask the weight of your family
÷
members. Compare your weight with
Thus, 4 : 5 is the simplest form of 36 : 45. each of your family members, and
write these comparisons in the form
of ratios in your notebook.
Get it right!

The ratio of 8 months to 2 years is expressed as 8 months : 2 × 12 months = 8 : 24 = 1 : 3
The ratio of 8 months to 2 years is expressed as 8 : 2 = 4 : 1

Example 3: Express the following statements as ratio:
( a) The cost of a chair is `480 and the cost of one table is `720.

( b) The distance between Delhi to Bharatpur is 220 km and the distance between Agra
to Jaipur is 300 km.
Solution: (a) The cost of a chair is `480 and the cost of one table is `720. The required ratio
480 2
= = = 2 : 3
720 3

( b) The distance between Delhi to Bharatpur is 220 km and the distance between Agra
220km 11
:
to Jaipur is 300 km. The required ratio = = = 11 15
300 km 15
Example 4: Sabia’s father earns `48000 per month. He spent `42000. Find the ratio of:
( a) his expenditure to salary.
( b) his savings to salary. Quick Check

( c) his expenditure to savings. In a box containing 90
Solution: Sabia’s father monthly income = `48000 apples, 7 were found rotten.
What is the ratio of good
His monthly expenditure = `42000 apples to all apples?
Therefore, his monthly savings = `48000 – `42000 = `6000

42000 7
(a) Ratio between his expenditure and his salary = = = 7 : 8
48000 8
6000 1
(b) Ratio between his savings and his salary = = = 1 : 8
48000 8
42000 7
( c) Ratio between his expenditure and his savings = = = 7 : 1
6000 1
Example 5: The length and the breadth of a rectangular field are 45 m and 15 m respectively. Find
the ratio of the length to the breadth of the field.
Solution: Length of the rectangular field = 45 m

Breadth of the rectangular field = 15 m
45
The ratio of the length to the breadth = = 3 : 1
15
Thus, the required ratio is 3 : 1.

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