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Subtract 3/90 from 28/20

1st number: 1 8/20, 2nd number: 3/90

28/20 - 3/90 is 41/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    28/20 = 28 × 9/20 × 9 = 252/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    3/90 = 3 × 2/90 × 2 = 6/180
  4. Subtract the two like fractions:
    252/180 - 6/180 = 252 - 6/180 = 246/180
  5. After reducing the fraction, the answer is 41/30
  6. In mixed form: 111/30

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