Subtract 20/15 from 56/21
1st number: 2 14/21, 2nd number: 1 5/15
56/21 - 20/15 is 4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
56/21 = 56 × 5/21 × 5 = 280/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
20/15 = 20 × 7/15 × 7 = 140/105 - Subtract the two like fractions:
280/105 - 140/105 = 280 - 140/105 = 140/105 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
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