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Subtract 20/12 from 5/15

1st number: 5/15, 2nd number: 1 8/12

5/15 - 20/12 is -4/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 15 × 4 = 60,
    5/15 = 5 × 4/15 × 4 = 20/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    20/12 = 20 × 5/12 × 5 = 100/60
  4. Subtract the two like fractions:
    20/60 - 100/60 = 20 - 100/60 = -80/60
  5. After reducing the fraction, the answer is -4/3

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