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Subtract 20/18 from 15/12

1st number: 1 3/12, 2nd number: 1 2/18

15/12 - 20/18 is 5/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 18 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 12 × 3 = 36,
    15/12 = 15 × 3/12 × 3 = 45/36
  3. Likewise, for the 2nd fraction, since 18 × 2 = 36,
    20/18 = 20 × 2/18 × 2 = 40/36
  4. Subtract the two like fractions:
    45/36 - 40/36 = 45 - 40/36 = 5/36

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