Explanation:
To simplify a ration, you have to find the greatest common factor (GCF) between the two numbers included in the ration.
Then divide both numbers by that GCF. For 4:12 ->
1. The GCF is 4, because it is a common factor of 4 and 12, and is the highest one
2. Divide both parts of the ratio by 4
= 1 : 3
The simplified ratio of 4:12 is 1:3
This means for every 1 part of one thing, you have 3 parts of another thing in the ratio.