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Add 28/21 and 84/5

1st number: 1 7/21, 2nd number: 16 4/5

28/21 + 84/5 is 272/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 5 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    28/21 = 28 × 5/21 × 5 = 140/105
  3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
    84/5 = 84 × 21/5 × 21 = 1764/105
  4. Add the two like fractions:
    140/105 + 1764/105 = 140 + 1764/105 = 1904/105
  5. 1904/105 simplified gives 272/15
  6. So, 28/21 + 84/5 = 272/15
    In mixed form: 182/15

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