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Add 9/18 and 42/81

9/18 + 42/81 is 55/54.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 81 is 162

    Next, find the equivalent fraction of both fractional numbers with denominator 162
  2. For the 1st fraction, since 18 × 9 = 162,
    9/18 = 9 × 9/18 × 9 = 81/162
  3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
    42/81 = 42 × 2/81 × 2 = 84/162
  4. Add the two like fractions:
    81/162 + 84/162 = 81 + 84/162 = 165/162
  5. 165/162 simplified gives 55/54
  6. So, 9/18 + 42/81 = 55/54
    In mixed form: 11/54

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