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Add 12/21 and 36/81

12/21 + 36/81 is 64/63.

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,
    36/81 = 36 × 7/81 × 7 = 252/567
  4. Add the two like fractions:
    324/567 + 252/567 = 324 + 252/567 = 576/567
  5. 576/567 simplified gives 64/63
  6. So, 12/21 + 36/81 = 64/63
    In mixed form: 11/63

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