Subtract 20/12 from 45/56
1st number: 45/56, 2nd number: 1 8/12
45/56 - 20/12 is -145/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 12 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
45/56 = 45 × 3/56 × 3 = 135/168 - Likewise, for the 2nd fraction, since 12 × 14 = 168,
20/12 = 20 × 14/12 × 14 = 280/168 - Subtract the two like fractions:
135/168 - 280/168 = 135 - 280/168 = -145/168
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