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Subtract 24/21 from 1/15

1st number: 1/15, 2nd number: 1 3/21

1/15 - 24/21 is -113/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    1/15 = 1 × 7/15 × 7 = 7/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    24/21 = 24 × 5/21 × 5 = 120/105
  4. Subtract the two like fractions:
    7/105 - 120/105 = 7 - 120/105 = -113/105

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