Here we will show you how to convert the ratio 15:90 to a fraction. In other words, we will convert the ratio of 15:90 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. 15:90 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 15:90 is a part-to-part ratio, it means that there are 15 of something and 90 of something else with a total of 105.
To convert a part-to-part ratio such as 15:90 as a fraction, you make the left side of the colon the numerator and the total the denominator:
15:90 → 15/105
Since there are 90 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:
15:90 → 90/105
Part-to-Whole
A part-to-whole ratio of 15:90 means that there are 15 of something and the total is 90. It also means that there are 75 of something else. To convert a Part-to-Whole ratio such as 15:90, you replace the colon with a fraction bar to get this answer:
15:90 → 15/90
Since there are 75 of something else and still the total of 90, you can also make a 2nd fraction like this:
15:90 → 75/90
Ratio to Fraction Converter
Use this tool to convert another ratio to a fraction.
15:91 as a fraction
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