Subtract 9/56 from 72/30, Solve 2 12/30

Subtract 9/56 from 72/30

1^st number: 2 12/30, 2^nd number: 9/56

72/30 - 9/56 is 627/280.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 30 × 28 = 840,
72/30 = 72 × 28/30 × 28 = 2016/840
Likewise, for the 2nd fraction, since 56 × 15 = 840,
9/56 = 9 × 15/56 × 15 = 135/840
Subtract the two like fractions:
2016/840 - 135/840 = 2016 - 135/840 = 1881/840
After reducing the fraction, the answer is 627/280
In mixed form: 267/280

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