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Add 15/42 and 12/28

15/42 + 12/28 is 11/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 28 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    15/42 = 15 × 2/42 × 2 = 30/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    12/28 = 12 × 3/28 × 3 = 36/84
  4. Add the two like fractions:
    30/84 + 36/84 = 30 + 36/84 = 66/84
  5. 66/84 simplified gives 11/14
  6. So, 15/42 + 12/28 = 11/14

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