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Add 12/9 and 21/36

1st number: 1 3/9, 2nd number: 21/36

12/9 + 21/36 is 23/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 36 is 36
  2. For the 1st fraction, since 9 × 4 = 36,
    12/9 = 12 × 4/9 × 4 = 48/36
  3. Likewise, for the 2nd fraction, since 36 × 1 = 36,
    21/36 = 21 × 1/36 × 1 = 21/36
  4. Add the two fractions:
    48/36 + 21/36 = 48 + 21/36 = 69/36
  5. 69/36 simplified gives 23/12
  6. So, 12/9 + 21/36 = 23/12
    In mixed form: 111/12

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