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Add 12/35 and 12/90

12/35 + 12/90 is 10/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 90 is 630
  2. For the 1st fraction, since 35 × 18 = 630,
    12/35 = 12 × 18/35 × 18 = 216/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    12/90 = 12 × 7/90 × 7 = 84/630
  4. Add the two fractions:
    216/630 + 84/630 = 216 + 84/630 = 300/630
  5. After reducing the fraction, the answer is 10/21

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