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Add 3/9 and 15/70

3/9 + 15/70 is 23/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 70 is 630
  2. For the 1st fraction, since 9 × 70 = 630,
    3/9 = 3 × 70/9 × 70 = 210/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    15/70 = 15 × 9/70 × 9 = 135/630
  4. Add the two fractions:
    210/630 + 135/630 = 210 + 135/630 = 345/630
  5. After reducing the fraction, the answer is 23/42

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