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Add 18/81 and 4/5

18/81 + 4/5 is 46/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 5 is 405

    Next, find the equivalent fraction of both fractional numbers with denominator 405
  2. For the 1st fraction, since 81 × 5 = 405,
    18/81 = 18 × 5/81 × 5 = 90/405
  3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
    4/5 = 4 × 81/5 × 81 = 324/405
  4. Add the two like fractions:
    90/405 + 324/405 = 90 + 324/405 = 414/405
  5. 414/405 simplified gives 46/45
  6. So, 18/81 + 4/5 = 46/45
    In mixed form: 11/45

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