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Subtract 42/15 from 1/30

1st number: 1/30, 2nd number: 2 12/15

1/30 - 42/15 is -83/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 15 is 30

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 30 × 1 = 30,
    1/30 = 1 × 1/30 × 1 = 1/30
  3. Likewise, for the 2nd fraction, since 15 × 2 = 30,
    42/15 = 42 × 2/15 × 2 = 84/30
  4. Subtract the two like fractions:
    1/30 - 84/30 = 1 - 84/30 = -83/30

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