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Add 5/15 and 25/42

5/15 + 25/42 is 13/14.

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,
    5/15 = 5 × 14/15 × 14 = 70/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    25/42 = 25 × 5/42 × 5 = 125/210
  4. Add the two like fractions:
    70/210 + 125/210 = 70 + 125/210 = 195/210
  5. 195/210 simplified gives 13/14
  6. So, 5/15 + 25/42 = 13/14

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