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Add 21/5 and 12/9

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

21/5 + 12/9 is 83/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 9 is 45

    Next, find the equivalent fraction of both fractional numbers with denominator 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,
    12/9 = 12 × 5/9 × 5 = 60/45
  4. Add the two like fractions:
    189/45 + 60/45 = 189 + 60/45 = 249/45
  5. 249/45 simplified gives 83/15
  6. So, 21/5 + 12/9 = 83/15
    In mixed form: 58/15

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