Subtract 21/20 from 15/56
1st number: 15/56, 2nd number: 1 1/20
15/56 - 21/20 is -219/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
15/56 = 15 × 5/56 × 5 = 75/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
21/20 = 21 × 14/20 × 14 = 294/280 - Subtract the two like fractions:
75/280 - 294/280 = 75 - 294/280 = -219/280
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