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Add 28/20 and 80/7

1st number: 1 8/20, 2nd number: 11 3/7

28/20 + 80/7 is 449/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 7 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    28/20 = 28 × 7/20 × 7 = 196/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    80/7 = 80 × 20/7 × 20 = 1600/140
  4. Add the two like fractions:
    196/140 + 1600/140 = 196 + 1600/140 = 1796/140
  5. 1796/140 simplified gives 449/35
  6. So, 28/20 + 80/7 = 449/35
    In mixed form: 1229/35

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