Subtract 25/56 from 21/12, Solve 1 9/12

Subtract 25/56 from 21/12

1^st number: 1 9/12, 2^nd number: 25/56

21/12 - 25/56 is 73/56.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 56 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 12 × 14 = 168,
21/12 = 21 × 14/12 × 14 = 294/168
Likewise, for the 2nd fraction, since 56 × 3 = 168,
25/56 = 25 × 3/56 × 3 = 75/168
Subtract the two like fractions:
294/168 - 75/168 = 294 - 75/168 = 219/168
After reducing the fraction, the answer is 73/56
In mixed form: 117/56

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