Subtract 21/30 from 56/15
1st number: 3 11/15, 2nd number: 21/30
56/15 - 21/30 is 91/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
56/15 = 56 × 2/15 × 2 = 112/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Subtract the two like fractions:
112/30 - 21/30 = 112 - 21/30 = 91/30 - In mixed form: 31/30
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