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Add 12/84 and 12/90

12/84 + 12/90 is 29/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 90 is 1260
  2. For the 1st fraction, since 84 × 15 = 1260,
    12/84 = 12 × 15/84 × 15 = 180/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    12/90 = 12 × 14/90 × 14 = 168/1260
  4. Add the two fractions:
    180/1260 + 168/1260 = 180 + 168/1260 = 348/1260
  5. After reducing the fraction, the answer is 29/105

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