There are 50 people (30 + 12 + 8) in the 21-40 age group and 30 of them are for the candidate.

So that is 30 out of 50 or 30 divided by 50:

30/50 = x/100 notice how you can make equivalent fractions? (rather than

multiply).

So that is 30 out of 50 or 30 divided by 50:

30/50 = x/100 notice how you can make equivalent fractions? (rather than

multiply).