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Add 28/20 and 1/90

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

28/20 + 1/90 is 127/90.

Steps for adding 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,
    1/90 = 1 × 2/90 × 2 = 2/180
  4. Add the two like fractions:
    252/180 + 2/180 = 252 + 2/180 = 254/180
  5. 254/180 simplified gives 127/90
  6. So, 28/20 + 1/90 = 127/90
    In mixed form: 137/90

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