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Add 7/84 and 28/81

7/84 + 28/81 is 139/324.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 81 is 2268

    Next, find the equivalent fraction of both fractional numbers with denominator 2268
  2. For the 1st fraction, since 84 × 27 = 2268,
    7/84 = 7 × 27/84 × 27 = 189/2268
  3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
    28/81 = 28 × 28/81 × 28 = 784/2268
  4. Add the two like fractions:
    189/2268 + 784/2268 = 189 + 784/2268 = 973/2268
  5. 973/2268 simplified gives 139/324
  6. So, 7/84 + 28/81 = 139/324

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