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Add 9/12 and 9/15

9/12 + 9/15 is 27/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 15 is 60
  2. For the 1st fraction, since 12 × 5 = 60,
    9/12 = 9 × 5/12 × 5 = 45/60
  3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
    9/15 = 9 × 4/15 × 4 = 36/60
  4. Add the two fractions:
    45/60 + 36/60 = 45 + 36/60 = 81/60
  5. 81/60 simplified gives 27/20
  6. So, 9/12 + 9/15 = 27/20
    In mixed form: 17/20

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