Subtract 21/56 from 1/20
1/20 - 21/56 is -13/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
1/20 = 1 × 14/20 × 14 = 14/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Subtract the two like fractions:
14/280 - 105/280 = 14 - 105/280 = -91/280 - After reducing the fraction, the answer is -13/40
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