4:5 as a fraction


Ratio as a Fraction

Here we will show you how to convert the ratio 4:5 to a fraction. In other words, we will convert the ratio of 4:5 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. 4:5 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 4:5 is a part-to-part ratio, it means that there are 4 of something and 5 of something else with a total of 9.

To convert a part-to-part ratio such as 4:5 as a fraction, you make the left side of the colon the numerator and the total the denominator:

4:5 → 4/9

Since there are 5 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:

4:5 → 5/9


Part-to-Whole

A part-to-whole ratio of 4:5 means that there are 4 of something and the total is 5. It also means that there is 1 of something else. To convert a Part-to-Whole ratio such as 4:5, you replace the colon with a fraction bar to get this answer:

4:5 → 4/5

Since there is 1 of something else and still the total of 5, you can also make a 2nd fraction like this:

4:5 → 1/5



Ratio to Fraction Converter
Use this tool to convert another ratio to a fraction.

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