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Add 12/28 and 28/80

12/28 + 28/80 is 109/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 28 × 20 = 560,
    12/28 = 12 × 20/28 × 20 = 240/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    28/80 = 28 × 7/80 × 7 = 196/560
  4. Add the two like fractions:
    240/560 + 196/560 = 240 + 196/560 = 436/560
  5. 436/560 simplified gives 109/140
  6. So, 12/28 + 28/80 = 109/140

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