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Subtract 81/40 from 1/12

1st number: 1/12, 2nd number: 2 1/40

1/12 - 81/40 is -233/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 12 × 10 = 120,
    1/12 = 1 × 10/12 × 10 = 10/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    81/40 = 81 × 3/40 × 3 = 243/120
  4. Subtract the two like fractions:
    10/120 - 243/120 = 10 - 243/120 = -233/120

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