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Subtract 12/9 from 3/12

1st number: 3/12, 2nd number: 1 3/9

3/12 - 12/9 is -13/12.

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,
    3/12 = 3 × 3/12 × 3 = 9/36
  3. Likewise, for the 2nd fraction, since 9 × 4 = 36,
    12/9 = 12 × 4/9 × 4 = 48/36
  4. Subtract the two like fractions:
    9/36 - 48/36 = 9 - 48/36 = -39/36
  5. After reducing the fraction, the answer is -13/12

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