Subtract 84/80 from 56/21, Solve 2 14/21

Subtract 84/80 from 56/21

1^st number: 2 14/21, 2^nd number: 1 4/80

56/21 - 84/80 is 97/60.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 21 × 80 = 1680,
56/21 = 56 × 80/21 × 80 = 4480/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680
Subtract the two like fractions:
4480/1680 - 1764/1680 = 4480 - 1764/1680 = 2716/1680
After reducing the fraction, the answer is 97/60
In mixed form: 137/60

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