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Add 12/21 and 18/27

12/21 + 18/27 is 26/21.

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,
    12/21 = 12 × 9/21 × 9 = 108/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    18/27 = 18 × 7/27 × 7 = 126/189
  4. Add the two like fractions:
    108/189 + 126/189 = 108 + 126/189 = 234/189
  5. 234/189 simplified gives 26/21
  6. So, 12/21 + 18/27 = 26/21
    In mixed form: 15/21

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