Add 72/15 and 9/12, Solve 4 12/15 + 9/12 as a fraction

Add 72/15 and 9/12

1^st number: 4 12/15, 2^nd number: 9/12

72/15 + 9/12 is 111/20.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 15 × 4 = 60,
72/15 = 72 × 4/15 × 4 = 288/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60
Add the two like fractions:
288/60 + 45/60 = 288 + 45/60 = 333/60
333/60 simplified gives 111/20
So, 72/15 + 9/12 = 111/20
In mixed form: 511/20

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