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Add 15/81 and 2/90

15/81 + 2/90 is 28/135.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 90 is 810

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 81 × 10 = 810,
    15/81 = 15 × 10/81 × 10 = 150/810
  3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
    2/90 = 2 × 9/90 × 9 = 18/810
  4. Add the two like fractions:
    150/810 + 18/810 = 150 + 18/810 = 168/810
  5. 168/810 simplified gives 28/135
  6. So, 15/81 + 2/90 = 28/135

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