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Subtract 12/80 from 28/4

1st number: 7 0/4, 2nd number: 12/80

28/4 - 12/80 is 137/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 4 × 20 = 80,
    28/4 = 28 × 20/4 × 20 = 560/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    12/80 = 12 × 1/80 × 1 = 12/80
  4. Subtract the two like fractions:
    560/80 - 12/80 = 560 - 12/80 = 548/80
  5. After reducing the fraction, the answer is 137/20
  6. In mixed form: 617/20

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