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Add 81/20 and 9/90

1st number: 4 1/20, 2nd number: 9/90

81/20 + 9/90 is 83/20.

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,
    81/20 = 81 × 9/20 × 9 = 729/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    9/90 = 9 × 2/90 × 2 = 18/180
  4. Add the two like fractions:
    729/180 + 18/180 = 729 + 18/180 = 747/180
  5. 747/180 simplified gives 83/20
  6. So, 81/20 + 9/90 = 83/20
    In mixed form: 43/20

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