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Add 14/15 and 25/42

14/15 + 25/42 is 107/70.

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,
    14/15 = 14 × 14/15 × 14 = 196/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    25/42 = 25 × 5/42 × 5 = 125/210
  4. Add the two like fractions:
    196/210 + 125/210 = 196 + 125/210 = 321/210
  5. 321/210 simplified gives 107/70
  6. So, 14/15 + 25/42 = 107/70
    In mixed form: 137/70

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