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Add 8/21 and 28/9

1st number: 8/21, 2nd number: 3 1/9

8/21 + 28/9 is 220/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    8/21 = 8 × 3/21 × 3 = 24/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    28/9 = 28 × 7/9 × 7 = 196/63
  4. Add the two fractions:
    24/63 + 196/63 = 24 + 196/63 = 220/63
  5. In mixed form: 331/63

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