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Add 28/80 and 35/20

1st number: 28/80, 2nd number: 1 15/20

28/80 + 35/20 is 21/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 20 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    28/80 = 28 × 1/80 × 1 = 28/80
  3. Likewise, for the 2nd fraction, since 20 × 4 = 80,
    35/20 = 35 × 4/20 × 4 = 140/80
  4. Add the two like fractions:
    28/80 + 140/80 = 28 + 140/80 = 168/80
  5. 168/80 simplified gives 21/10
  6. So, 28/80 + 35/20 = 21/10
    In mixed form: 21/10

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