Subtract 90/24 from 56/35, Solve 1 21/35

Subtract 90/24 from 56/35

1^st number: 1 21/35, 2^nd number: 3 18/24

56/35 - 90/24 is -43/20.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 24 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 35 × 24 = 840,
56/35 = 56 × 24/35 × 24 = 1344/840
Likewise, for the 2nd fraction, since 24 × 35 = 840,
90/24 = 90 × 35/24 × 35 = 3150/840
Subtract the two like fractions:
1344/840 - 3150/840 = 1344 - 3150/840 = -1806/840
After reducing the fraction, the answer is -43/20

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