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Subtract 20/18 from 4/9

1st number: 4/9, 2nd number: 1 2/18

4/9 - 20/18 is -2/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 18 is 18

    Next, find the equivalent fraction of both fractional numbers with denominator 18
  2. For the 1st fraction, since 9 × 2 = 18,
    4/9 = 4 × 2/9 × 2 = 8/18
  3. Likewise, for the 2nd fraction, since 18 × 1 = 18,
    20/18 = 20 × 1/18 × 1 = 20/18
  4. Subtract the two like fractions:
    8/18 - 20/18 = 8 - 20/18 = -12/18
  5. After reducing the fraction, the answer is -2/3

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