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Add 18/80 and 84/28

1st number: 18/80, 2nd number: 3 0/28

18/80 + 84/28 is 129/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 80 × 7 = 560,
    18/80 = 18 × 7/80 × 7 = 126/560
  3. Likewise, for the 2nd fraction, since 28 × 20 = 560,
    84/28 = 84 × 20/28 × 20 = 1680/560
  4. Add the two like fractions:
    126/560 + 1680/560 = 126 + 1680/560 = 1806/560
  5. 1806/560 simplified gives 129/40
  6. So, 18/80 + 84/28 = 129/40
    In mixed form: 39/40

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