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Subtract 18/24 from 12/20

12/20 - 18/24 is -3/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 24 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 20 × 6 = 120,
    12/20 = 12 × 6/20 × 6 = 72/120
  3. Likewise, for the 2nd fraction, since 24 × 5 = 120,
    18/24 = 18 × 5/24 × 5 = 90/120
  4. Subtract the two like fractions:
    72/120 - 90/120 = 72 - 90/120 = -18/120
  5. After reducing the fraction, the answer is -3/20

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