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Subtract 42/12 from 1/18

1st number: 1/18, 2nd number: 3 6/12

1/18 - 42/12 is -31/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 12 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 18 × 2 = 36,
    1/18 = 1 × 2/18 × 2 = 2/36
  3. Likewise, for the 2nd fraction, since 12 × 3 = 36,
    42/12 = 42 × 3/12 × 3 = 126/36
  4. Subtract the two like fractions:
    2/36 - 126/36 = 2 - 126/36 = -124/36
  5. After reducing the fraction, the answer is -31/9

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