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Add 42/15 and 15/42

1st number: 2 12/15, 2nd number: 15/42

42/15 + 15/42 is 221/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 15 × 14 = 210,
    42/15 = 42 × 14/15 × 14 = 588/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    15/42 = 15 × 5/42 × 5 = 75/210
  4. Add the two like fractions:
    588/210 + 75/210 = 588 + 75/210 = 663/210
  5. 663/210 simplified gives 221/70
  6. So, 42/15 + 15/42 = 221/70
    In mixed form: 311/70

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