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Add 12/21 and 12/81

12/21 + 12/81 is 136/189.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 81 is 567

    Next, find the equivalent fraction of both fractional numbers with denominator 567
  2. For the 1st fraction, since 21 × 27 = 567,
    12/21 = 12 × 27/21 × 27 = 324/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    12/81 = 12 × 7/81 × 7 = 84/567
  4. Add the two like fractions:
    324/567 + 84/567 = 324 + 84/567 = 408/567
  5. 408/567 simplified gives 136/189
  6. So, 12/21 + 12/81 = 136/189

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