Subtract 81/28 from 84/24, Solve 3 12/24

Subtract 81/28 from 84/24

1^st number: 3 12/24, 2^nd number: 2 25/28

84/24 - 81/28 is 17/28.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 28 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 24 × 7 = 168,
84/24 = 84 × 7/24 × 7 = 588/168
Likewise, for the 2nd fraction, since 28 × 6 = 168,
81/28 = 81 × 6/28 × 6 = 486/168
Subtract the two like fractions:
588/168 - 486/168 = 588 - 486/168 = 102/168
After reducing the fraction, the answer is 17/28

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