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Add 28/20 and 90/9

1st number: 1 8/20, 2nd number: 10 0/9

28/20 + 90/9 is 57/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 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 9 × 20 = 180,
    90/9 = 90 × 20/9 × 20 = 1800/180
  4. Add the two like fractions:
    252/180 + 1800/180 = 252 + 1800/180 = 2052/180
  5. 2052/180 simplified gives 57/5
  6. So, 28/20 + 90/9 = 57/5
    In mixed form: 112/5

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