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Subtract 18/56 from 1/20

1/20 - 18/56 is -19/70.

Steps for subtracting fractions

  1. 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
  2. For the 1st fraction, since 20 × 14 = 280,
    1/20 = 1 × 14/20 × 14 = 14/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    18/56 = 18 × 5/56 × 5 = 90/280
  4. Subtract the two like fractions:
    14/280 - 90/280 = 14 - 90/280 = -76/280
  5. After reducing the fraction, the answer is -19/70

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