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Subtract 18/81 from 24/21

1st number: 1 3/21, 2nd number: 18/81

24/21 - 18/81 is 58/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 81 is 567
  2. For the 1st fraction, since 21 × 27 = 567,
    24/21 = 24 × 27/21 × 27 = 648/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    18/81 = 18 × 7/81 × 7 = 126/567
  4. Subtract the two fractions:
    648/567 - 126/567 = 648 - 126/567 = 522/567
  5. After reducing the fraction, the answer is 58/63

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