Subtract 72/56 from 28/15, Solve 1 13/15

Subtract 72/56 from 28/15

1^st number: 1 13/15, 2^nd number: 1 16/56

28/15 - 72/56 is 61/105.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 15 × 56 = 840,
28/15 = 28 × 56/15 × 56 = 1568/840
Likewise, for the 2nd fraction, since 56 × 15 = 840,
72/56 = 72 × 15/56 × 15 = 1080/840
Subtract the two like fractions:
1568/840 - 1080/840 = 1568 - 1080/840 = 488/840
After reducing the fraction, the answer is 61/105

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