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Add 28/80 and 9/15

28/80 + 9/15 is 19/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 15 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 80 × 3 = 240,
    28/80 = 28 × 3/80 × 3 = 84/240
  3. Likewise, for the 2nd fraction, since 15 × 16 = 240,
    9/15 = 9 × 16/15 × 16 = 144/240
  4. Add the two like fractions:
    84/240 + 144/240 = 84 + 144/240 = 228/240
  5. 228/240 simplified gives 19/20
  6. So, 28/80 + 9/15 = 19/20

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