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Add 4/90 and 15/81

4/90 + 15/81 is 31/135.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 90 × 9 = 810,
    4/90 = 4 × 9/90 × 9 = 36/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    15/81 = 15 × 10/81 × 10 = 150/810
  4. Add the two like fractions:
    36/810 + 150/810 = 36 + 150/810 = 186/810
  5. 186/810 simplified gives 31/135
  6. So, 4/90 + 15/81 = 31/135

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