How to change 4 out of 9 and 5 out of 12 into fractions with denominator of 36 and constant size, and 3 out of 7 and 4 out of 11 into fractions with denominator of 24 and constant size

How to change 4 out of 9 and 5 out of 12 into fractions with denominator of 36 and constant size, and 3 out of 7 and 4 out of 11 into fractions with denominator of 24 and constant size

4/9=16/36
5/12=15/36
3/7=24/56
4/11=24/66
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