notes
Ratio means comparing two quantities.
A basket has two types of fruits, say, 20 apples and 5 oranges.
Then, the ratio of the number of oranges to the number of apples = 5 : 20.
The comparison can be done by using fractions as , `5/20 = 1/4`
The number of oranges is `1/4`th the number of apples. In terms of ratio, this is 1 : 4, read as, “1 is to 4” OR
Number of apples to number of oranges = `20/5 = 4/1` = which means, the number of apples is 4 times the number of oranges. This comparison can also be done using percentages.
There are 5 oranges out of 25 fruits. So percentage of oranges is `5/25 xx 4/4 = 20/100` = 20% [Denominator made 100]. OR
By unitary method: Out of 25 fruits, number of oranges are 5. So out of 100 fruits, number of oranges `=5/25 xx 100 = 20 `
Since 
contains only apples and oranges ,
So, percentage of apples + percentage of oranges = 100
or percentage of apples + 20 = 100
or percentage of apples = 100 – 20 = 80
Thus the basket has 20% oranges and 80% apples.
