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Add 28/70 and 63/80

28/70 + 63/80 is 19/16.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    28/70 = 28 × 8/70 × 8 = 224/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    63/80 = 63 × 7/80 × 7 = 441/560
  4. Add the two like fractions:
    224/560 + 441/560 = 224 + 441/560 = 665/560
  5. 665/560 simplified gives 19/16
  6. So, 28/70 + 63/80 = 19/16
    In mixed form: 13/16

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