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Add 9/10 and 90/81

1st number: 9/10, 2nd number: 1 9/81

9/10 + 90/81 is 181/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 81 is 810

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 10 × 81 = 810,
    9/10 = 9 × 81/10 × 81 = 729/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    90/81 = 90 × 10/81 × 10 = 900/810
  4. Add the two like fractions:
    729/810 + 900/810 = 729 + 900/810 = 1629/810
  5. 1629/810 simplified gives 181/90
  6. So, 9/10 + 90/81 = 181/90
    In mixed form: 21/90

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