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Subtract 16/9 from 21/12

1st number: 1 9/12, 2nd number: 1 7/9

21/12 - 16/9 is -1/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 9 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 12 × 3 = 36,
    21/12 = 21 × 3/12 × 3 = 63/36
  3. Likewise, for the 2nd fraction, since 9 × 4 = 36,
    16/9 = 16 × 4/9 × 4 = 64/36
  4. Subtract the two like fractions:
    63/36 - 64/36 = 63 - 64/36 = -1/36

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