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Add 28/42 and 12/15

28/42 + 12/15 is 22/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 15 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    28/42 = 28 × 5/42 × 5 = 140/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    12/15 = 12 × 14/15 × 14 = 168/210
  4. Add the two fractions:
    140/210 + 168/210 = 140 + 168/210 = 308/210
  5. After reducing the fraction, the answer is 22/15
  6. In mixed form: 17/15

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