Subtract 56/84 from 90/5, Solve 18 0/5

Subtract 56/84 from 90/5

1^st number: 18 0/5, 2^nd number: 56/84

90/5 - 56/84 is 52/3.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 5 × 84 = 420,
90/5 = 90 × 84/5 × 84 = 7560/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
56/84 = 56 × 5/84 × 5 = 280/420
Subtract the two like fractions:
7560/420 - 280/420 = 7560 - 280/420 = 7280/420
After reducing the fraction, the answer is 52/3
In mixed form: 171/3

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