Subtract 56/35 from 3/21, Solve 3/21

Subtract 56/35 from 3/21

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

3/21 - 56/35 is -51/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
3/21 = 3 × 5/21 × 5 = 15/105
Likewise, for the 2nd fraction, since 35 × 3 = 105,
56/35 = 56 × 3/35 × 3 = 168/105
Subtract the two like fractions:
15/105 - 168/105 = 15 - 168/105 = -153/105
After reducing the fraction, the answer is -51/35

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