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Add 12/84 and 9/81

12/84 + 9/81 is 16/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 81 is 2268
  2. For the 1st fraction, since 84 × 27 = 2268,
    12/84 = 12 × 27/84 × 27 = 324/2268
  3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
    9/81 = 9 × 28/81 × 28 = 252/2268
  4. Add the two fractions:
    324/2268 + 252/2268 = 324 + 252/2268 = 576/2268
  5. After reducing the fraction, the answer is 16/63

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