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Add 12/15 and 18/30

12/15 + 18/30 is 7/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 30 is 30

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 15 × 2 = 30,
    12/15 = 12 × 2/15 × 2 = 24/30
  3. Likewise, for the 2nd fraction, since 30 × 1 = 30,
    18/30 = 18 × 1/30 × 1 = 18/30
  4. Add the two like fractions:
    24/30 + 18/30 = 24 + 18/30 = 42/30
  5. 42/30 simplified gives 7/5
  6. So, 12/15 + 18/30 = 7/5
    In mixed form: 12/5

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