Here we will show you how to convert the ratio 1:3 to a fraction. In other words, we will convert the ratio of 1:3 to a fraction with a numerator and a denominator.
There is actually more than one answer to this problem, depending on what kind of ratio it is. 1:3 can either be a Part-to-Part ratio or a Part-to-Whole ratio. We will describe and convert both types of ratios to fractions.
Part-to-Part
A part-to-part ratio is the most common form of ratio. If the ratio 1:3 is a part-to-part ratio, it means that there is 1 of something and 3 of something else with a total of 4.
To convert a part-to-part ratio such as 1:3 as a fraction, you make the left side of the colon the numerator and the total the denominator:
1:3 → 1/4
Since there are 3 of something else, you can also make another fraction where the right side of the colon is the numerator and once again the total is the denominator:
1:3 → 3/4
Part-to-Whole
A part-to-whole ratio of 1:3 means that there is 1 of something and the total is 3. It also means that there are 2 of something else. To convert a Part-to-Whole ratio such as 1:3, you replace the colon with a fraction bar to get this answer:
1:3 → 1/3
Since there are 2 of something else and still the total of 3, you can also make a 2nd fraction like this:
1:3 → 2/3
Ratio to Fraction Converter
Use this tool to convert another ratio to a fraction.
1:4 as a fraction
Here is the next ratio on our list that we have converted to a fraction.