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Add 28/84 and 3/90

28/84 + 3/90 is 11/30.

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,
    28/84 = 28 × 15/84 × 15 = 420/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    3/90 = 3 × 14/90 × 14 = 42/1260
  4. Add the two fractions:
    420/1260 + 42/1260 = 420 + 42/1260 = 462/1260
  5. 462/1260 simplified gives 11/30
  6. So, 28/84 + 3/90 = 11/30

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