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Subtract 20/24 from 1/18

1/18 - 20/24 is -7/9.

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,
    1/18 = 1 × 4/18 × 4 = 4/72
  3. Likewise, for the 2nd fraction, since 24 × 3 = 72,
    20/24 = 20 × 3/24 × 3 = 60/72
  4. Subtract the two like fractions:
    4/72 - 60/72 = 4 - 60/72 = -56/72
  5. After reducing the fraction, the answer is -7/9

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