Subtract 28/84 from 90/24, Solve 3 18/24

Subtract 28/84 from 90/24

1^st number: 3 18/24, 2^nd number: 28/84

90/24 - 28/84 is 41/12.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 84 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 24 × 7 = 168,
90/24 = 90 × 7/24 × 7 = 630/168
Likewise, for the 2nd fraction, since 84 × 2 = 168,
28/84 = 28 × 2/84 × 2 = 56/168
Subtract the two like fractions:
630/168 - 56/168 = 630 - 56/168 = 574/168
After reducing the fraction, the answer is 41/12
In mixed form: 35/12

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