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Subtract 8/21 from 24/15

1st number: 1 9/15, 2nd number: 8/21

24/15 - 8/21 is 128/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105
  2. For the 1st fraction, since 15 × 7 = 105,
    24/15 = 24 × 7/15 × 7 = 168/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    8/21 = 8 × 5/21 × 5 = 40/105
  4. Subtract the two fractions:
    168/105 - 40/105 = 168 - 40/105 = 128/105
  5. In mixed form: 123/105

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