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Add 3/15 and 3/42

3/15 + 3/42 is 19/70.

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,
    3/15 = 3 × 14/15 × 14 = 42/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    3/42 = 3 × 5/42 × 5 = 15/210
  4. Add the two like fractions:
    42/210 + 15/210 = 42 + 15/210 = 57/210
  5. 57/210 simplified gives 19/70
  6. So, 3/15 + 3/42 = 19/70

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