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Add 12/81 and 21/36

12/81 + 21/36 is 79/108.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 36 is 324

    Next, find the equivalent fraction of both fractional numbers with denominator 324
  2. For the 1st fraction, since 81 × 4 = 324,
    12/81 = 12 × 4/81 × 4 = 48/324
  3. Likewise, for the 2nd fraction, since 36 × 9 = 324,
    21/36 = 21 × 9/36 × 9 = 189/324
  4. Add the two like fractions:
    48/324 + 189/324 = 48 + 189/324 = 237/324
  5. 237/324 simplified gives 79/108
  6. So, 12/81 + 21/36 = 79/108

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