Subtract 9/12 from 56/35, Solve 1 21/35

Subtract 9/12 from 56/35

1^st number: 1 21/35, 2^nd number: 9/12

56/35 - 9/12 is 17/20.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 35 × 12 = 420,
56/35 = 56 × 12/35 × 12 = 672/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
9/12 = 9 × 35/12 × 35 = 315/420
Subtract the two like fractions:
672/420 - 315/420 = 672 - 315/420 = 357/420
After reducing the fraction, the answer is 17/20

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