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Add 4/42 and 5/15

4/42 + 5/15 is 3/7.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    4/42 = 4 × 5/42 × 5 = 20/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    5/15 = 5 × 14/15 × 14 = 70/210
  4. Add the two like fractions:
    20/210 + 70/210 = 20 + 70/210 = 90/210
  5. 90/210 simplified gives 3/7
  6. So, 4/42 + 5/15 = 3/7

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