Subtract 21/56 from 72/10, Solve 7 2/10

Subtract 21/56 from 72/10

1^st number: 7 2/10, 2^nd number: 21/56

72/10 - 21/56 is 273/40.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 56 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 10 × 28 = 280,
72/10 = 72 × 28/10 × 28 = 2016/280
Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280
Subtract the two like fractions:
2016/280 - 105/280 = 2016 - 105/280 = 1911/280
After reducing the fraction, the answer is 273/40
In mixed form: 633/40

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