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Add 12/90 and 18/84

12/90 + 18/84 is 73/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 84 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 90 × 14 = 1260,
    12/90 = 12 × 14/90 × 14 = 168/1260
  3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
    18/84 = 18 × 15/84 × 15 = 270/1260
  4. Add the two like fractions:
    168/1260 + 270/1260 = 168 + 270/1260 = 438/1260
  5. 438/1260 simplified gives 73/210
  6. So, 12/90 + 18/84 = 73/210

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