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Add 21/5 and 28/9

1st number: 4 1/5, 2nd number: 3 1/9

21/5 + 28/9 is 329/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 9 is 45
  2. For the 1st fraction, since 5 × 9 = 45,
    21/5 = 21 × 9/5 × 9 = 189/45
  3. Likewise, for the 2nd fraction, since 9 × 5 = 45,
    28/9 = 28 × 5/9 × 5 = 140/45
  4. Add the two fractions:
    189/45 + 140/45 = 189 + 140/45 = 329/45
  5. In mixed form: 714/45

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