Subtract 90/60 from 56/84, Solve 56/84

Subtract 90/60 from 56/84

1^st number: 56/84, 2^nd number: 1 30/60

56/84 - 90/60 is -5/6.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
56/84 = 56 × 5/84 × 5 = 280/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420
Subtract the two like fractions:
280/420 - 630/420 = 280 - 630/420 = -350/420
After reducing the fraction, the answer is -5/6

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