Subtract 21/12 from 56/20, Solve 2 16/20

Subtract 21/12 from 56/20

1^st number: 2 16/20, 2^nd number: 1 9/12

56/20 - 21/12 is 21/20.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 20 × 3 = 60,
56/20 = 56 × 3/20 × 3 = 168/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60
Subtract the two like fractions:
168/60 - 105/60 = 168 - 105/60 = 63/60
After reducing the fraction, the answer is 21/20
In mixed form: 11/20

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