Add 72/21 and 9/36, Solve 3 9/21 + 9/36 as a fraction

Add 72/21 and 9/36

1^st number: 3 9/21, 2^nd number: 9/36

72/21 + 9/36 is 103/28.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
72/21 = 72 × 12/21 × 12 = 864/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
9/36 = 9 × 7/36 × 7 = 63/252
Add the two like fractions:
864/252 + 63/252 = 864 + 63/252 = 927/252
927/252 simplified gives 103/28
So, 72/21 + 9/36 = 103/28
In mixed form: 319/28

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