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Subtract 1/21 from 20/24

20/24 - 1/21 is 11/14.

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,
    20/24 = 20 × 7/24 × 7 = 140/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    1/21 = 1 × 8/21 × 8 = 8/168
  4. Subtract the two like fractions:
    140/168 - 8/168 = 140 - 8/168 = 132/168
  5. After reducing the fraction, the answer is 11/14

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