Subtract 56/36 from 84/21, Solve 4 0/21

Subtract 56/36 from 84/21

1^st number: 4 0/21, 2^nd number: 1 20/36

84/21 - 56/36 is 22/9.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
84/21 = 84 × 12/21 × 12 = 1008/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
56/36 = 56 × 7/36 × 7 = 392/252
Subtract the two like fractions:
1008/252 - 392/252 = 1008 - 392/252 = 616/252
After reducing the fraction, the answer is 22/9
In mixed form: 24/9

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