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Add 28/80 and 45/75

28/80 + 45/75 is 19/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 75 is 1200

    Next, find the equivalent fraction of both fractional numbers with denominator 1200
  2. For the 1st fraction, since 80 × 15 = 1200,
    28/80 = 28 × 15/80 × 15 = 420/1200
  3. Likewise, for the 2nd fraction, since 75 × 16 = 1200,
    45/75 = 45 × 16/75 × 16 = 720/1200
  4. Add the two like fractions:
    420/1200 + 720/1200 = 420 + 720/1200 = 1140/1200
  5. 1140/1200 simplified gives 19/20
  6. So, 28/80 + 45/75 = 19/20

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