Ratio simply means the number of times one value is containeds in another value.
For example, a bowl contain 2 bananas and 3 oranges
The ratio of banana to orange is 2: 3 and the ratio of orange to banana is 3:2
To evaluate any ratio
Add up the ratio numbers to becaome a whole number
That is 2+3 = 5
Take each ratio to be its own numerator and the total ratio to be the denominator
That is; 2:3 implies 2/5 and 3/5
For example;
A bag contains 20 oranges and banana. The ratio of oranges to banana is 2:3. Find the number of oranges and banana.
To find the number of oranges
2:3 = 2+3 = 5
number of oranges = 2/5 x total number of oranges and banana
= 2/5 x 20
=40/5
=8
number of banana = 3/5 x total number of oranges and bananas
= 3/5 x 20
=60/5
=12