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Add 12/15 and 12/28

12/15 + 12/28 is 43/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 28 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 15 × 28 = 420,
    12/15 = 12 × 28/15 × 28 = 336/420
  3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
    12/28 = 12 × 15/28 × 15 = 180/420
  4. Add the two like fractions:
    336/420 + 180/420 = 336 + 180/420 = 516/420
  5. 516/420 simplified gives 43/35
  6. So, 12/15 + 12/28 = 43/35
    In mixed form: 18/35

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