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Add 28/15 and 18/42

1st number: 1 13/15, 2nd number: 18/42

28/15 + 18/42 is 241/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210
  2. For the 1st fraction, since 15 × 14 = 210,
    28/15 = 28 × 14/15 × 14 = 392/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    18/42 = 18 × 5/42 × 5 = 90/210
  4. Add the two fractions:
    392/210 + 90/210 = 392 + 90/210 = 482/210
  5. After reducing the fraction, the answer is 241/105
  6. In mixed form: 231/105

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