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Subtract 1/21 from 18/24

18/24 - 1/21 is 59/84.

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,
    18/24 = 18 × 7/24 × 7 = 126/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    1/21 = 1 × 8/21 × 8 = 8/168
  4. Subtract the two like fractions:
    126/168 - 8/168 = 126 - 8/168 = 118/168
  5. After reducing the fraction, the answer is 59/84

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