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Add 15/42 and 35/70

15/42 + 35/70 is 6/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 70 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    15/42 = 15 × 5/42 × 5 = 75/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    35/70 = 35 × 3/70 × 3 = 105/210
  4. Add the two fractions:
    75/210 + 105/210 = 75 + 105/210 = 180/210
  5. After reducing the fraction, the answer is 6/7

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