Subtract 80/21 from 56/15
1st number: 3 11/15, 2nd number: 3 17/21
56/15 - 80/21 is -8/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
56/15 = 56 × 7/15 × 7 = 392/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
80/21 = 80 × 5/21 × 5 = 400/105 - Subtract the two like fractions:
392/105 - 400/105 = 392 - 400/105 = -8/105
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