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Add 15/18 and 30/35

15/18 + 30/35 is 71/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 35 is 630
  2. For the 1st fraction, since 18 × 35 = 630,
    15/18 = 15 × 35/18 × 35 = 525/630
  3. Likewise, for the 2nd fraction, since 35 × 18 = 630,
    30/35 = 30 × 18/35 × 18 = 540/630
  4. Add the two fractions:
    525/630 + 540/630 = 525 + 540/630 = 1065/630
  5. After reducing the fraction, the answer is 71/42
  6. In mixed form: 129/42

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