21:63 in simplest form
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1:3

Step-by-step explanation:

Since 7 goes into both 21 and 63 you are going to divide 21 and 63 by 7:

21/7 = 3

63/7 = 9

So now we have 3:9 but we can go even further than that, 3 can go into both 3 and 9 so we are going to divide 3 and 9 by 3:

3/3 = 1

9/3 = 3

So we now have 1:3 ratio for the simplest form of of the ratio 21:63

Hope this helps you!!!

step-by-step explanation:

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