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Add 21/3 and 81/28

1st number: 7 0/3, 2nd number: 2 25/28

21/3 + 81/28 is 277/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 28 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 3 × 28 = 84,
    21/3 = 21 × 28/3 × 28 = 588/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    81/28 = 81 × 3/28 × 3 = 243/84
  4. Add the two like fractions:
    588/84 + 243/84 = 588 + 243/84 = 831/84
  5. 831/84 simplified gives 277/28
  6. So, 21/3 + 81/28 = 277/28
    In mixed form: 925/28

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