Here we will show you how to convert the ratio 3:7 to a fraction. In other words, we will convert the ratio of 3:7 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. 3:7 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 3:7 is a part-to-part ratio, it means that there are 3 of something and 7 of something else with a total of 10.
To convert a part-to-part ratio such as 3:7 as a fraction, you make the left side of the colon the numerator and the total the denominator:
3:7 → 3/10
Since there are 7 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:
3:7 → 7/10
Part-to-Whole
A part-to-whole ratio of 3:7 means that there are 3 of something and the total is 7. It also means that there are 4 of something else. To convert a Part-to-Whole ratio such as 3:7, you replace the colon with a fraction bar to get this answer:
3:7 → 3/7
Since there are 4 of something else and still the total of 7, you can also make a 2nd fraction like this:
3:7 → 4/7
Ratio to Fraction Converter
Use this tool to convert another ratio to a fraction.
3:8 as a fraction
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