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Subtract 42/24 from 30/18

1st number: 1 12/18, 2nd number: 1 18/24

30/18 - 42/24 is -1/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 24 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 18 × 4 = 72,
    30/18 = 30 × 4/18 × 4 = 120/72
  3. Likewise, for the 2nd fraction, since 24 × 3 = 72,
    42/24 = 42 × 3/24 × 3 = 126/72
  4. Subtract the two like fractions:
    120/72 - 126/72 = 120 - 126/72 = -6/72
  5. After reducing the fraction, the answer is -1/12

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