1. Properties of ratios

2. Properties of ratios 1. Ratio has no units.
Example: Ratio of 4m to 7m is written as 4:7 and not as 4m:7m.
2. Quantities of a ratio should be of the same unit
In the above example both the numbers have same unit m
3. Each number of the ratio is called term.
In the ratio 4:7, the numbers 4 and 7 are called as term.
Order of the terms in a ratio cannot be reversed
Ratio we get by reversing the term of given ratio are not same
The ratio 4:7 is not equal to ratio 7:4

3. Can the given quantity be expressed as a ratio?
Information
Explanation
Ratio form
7 pens and 9 pens
Count of pens-Numbers
7:9
3m and 45cm
Different units – m,cm
Cannot be expressed as a ratio
32ml and 41ml
Same units - ml
32:41
Rs.8 and 50 paise
Different units – Rs, paise
Cannot be expressed as a ratio
Rs.100 and Rs.55
Same units - Rs
100:55
2kg of onions and 3kg of tomatoes
Same units – kg
(Items can be different)
2:3

4. Try These
Can the given information be represented as a ratio.Give reasons
15ml and 6ml
3km and 45cm
4apples and Rs.120
2litres of milk and 3litres of juices