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Subtract 18/21 from 1/24

1/24 - 18/21 is -137/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 21 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 24 × 7 = 168,
    1/24 = 1 × 7/24 × 7 = 7/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    18/21 = 18 × 8/21 × 8 = 144/168
  4. Subtract the two like fractions:
    7/168 - 144/168 = 7 - 144/168 = -137/168

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