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Subtract 25/9 from 21/24

1st number: 21/24, 2nd number: 2 7/9

21/24 - 25/9 is -137/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 9 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 24 × 3 = 72,
    21/24 = 21 × 3/24 × 3 = 63/72
  3. Likewise, for the 2nd fraction, since 9 × 8 = 72,
    25/9 = 25 × 8/9 × 8 = 200/72
  4. Subtract the two like fractions:
    63/72 - 200/72 = 63 - 200/72 = -137/72

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