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Subtract 21/20 from 18/14

1st number: 1 4/14, 2nd number: 1 1/20

18/14 - 21/20 is 33/140.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 14 × 10 = 140,
    18/14 = 18 × 10/14 × 10 = 180/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    21/20 = 21 × 7/20 × 7 = 147/140
  4. Subtract the two like fractions:
    180/140 - 147/140 = 180 - 147/140 = 33/140

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