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Subtract 21/14 from 1/20

1st number: 1/20, 2nd number: 1 7/14

1/20 - 21/14 is -29/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 14 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    1/20 = 1 × 7/20 × 7 = 7/140
  3. Likewise, for the 2nd fraction, since 14 × 10 = 140,
    21/14 = 21 × 10/14 × 10 = 210/140
  4. Subtract the two like fractions:
    7/140 - 210/140 = 7 - 210/140 = -203/140
  5. After reducing the fraction, the answer is -29/20

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