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Add 21/3 and 4/81

1st number: 7 0/3, 2nd number: 4/81

21/3 + 4/81 is 571/81.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 81 is 81

    Next, find the equivalent fraction of both fractional numbers with denominator 81
  2. For the 1st fraction, since 3 × 27 = 81,
    21/3 = 21 × 27/3 × 27 = 567/81
  3. Likewise, for the 2nd fraction, since 81 × 1 = 81,
    4/81 = 4 × 1/81 × 1 = 4/81
  4. Add the two like fractions:
    567/81 + 4/81 = 567 + 4/81 = 571/81
  5. So, 21/3 + 4/81 = 571/81
    In mixed form: 74/81

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