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Add 15/70 and 30/90

15/70 + 30/90 is 23/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 70 × 9 = 630,
    15/70 = 15 × 9/70 × 9 = 135/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    30/90 = 30 × 7/90 × 7 = 210/630
  4. Add the two like fractions:
    135/630 + 210/630 = 135 + 210/630 = 345/630
  5. 345/630 simplified gives 23/42
  6. So, 15/70 + 30/90 = 23/42

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