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Subtract 20/5 from 3/12

1st number: 3/12, 2nd number: 4 0/5

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

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 5 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 12 × 5 = 60,
    3/12 = 3 × 5/12 × 5 = 15/60
  3. Likewise, for the 2nd fraction, since 5 × 12 = 60,
    20/5 = 20 × 12/5 × 12 = 240/60
  4. Subtract the two like fractions:
    15/60 - 240/60 = 15 - 240/60 = -225/60
  5. After reducing the fraction, the answer is -15/4

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