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Subtract 1/3 from 12/40

12/40 - 1/3 is -1/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 3 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    12/40 = 12 × 3/40 × 3 = 36/120
  3. Likewise, for the 2nd fraction, since 3 × 40 = 120,
    1/3 = 1 × 40/3 × 40 = 40/120
  4. Subtract the two like fractions:
    36/120 - 40/120 = 36 - 40/120 = -4/120
  5. After reducing the fraction, the answer is -1/30

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