Simplify Ratio 21:9

Here we will simplify the ratio 21:9 for you and show you how we did it.

To simplify the ratio 21:9, we find the greatest common divisor of 21 and 9, and then we divide 21 and 9 by the greatest common divisor.

The greatest common divisor that you can use to simplify 21:9 is 3. Which means the answer to ratio 21:9 simplified is:

7:3

Here is the math to illustrate better:
21/3 = 7 and 9/3 = 3
Thus, 21:9 ratio simplified is 7:3

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