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Add 18/21 and 12/27

18/21 + 12/27 is 82/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 21 × 9 = 189,
    18/21 = 18 × 9/21 × 9 = 162/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    12/27 = 12 × 7/27 × 7 = 84/189
  4. Add the two like fractions:
    162/189 + 84/189 = 162 + 84/189 = 246/189
  5. 246/189 simplified gives 82/63
  6. So, 18/21 + 12/27 = 82/63
    In mixed form: 119/63

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