Add 72/45 and 15/12, Solve 1 27/45 + 1 3/12 as a fraction

Add 72/45 and 15/12

1^st number: 1 27/45, 2^nd number: 1 3/12

72/45 + 15/12 is 57/20.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180
Likewise, for the 2nd fraction, since 12 × 15 = 180,
15/12 = 15 × 15/12 × 15 = 225/180
Add the two like fractions:
288/180 + 225/180 = 288 + 225/180 = 513/180
513/180 simplified gives 57/20
So, 72/45 + 15/12 = 57/20
In mixed form: 217/20

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