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Add 21/30 and 4/9

21/30 + 4/9 is 103/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 9 is 90
  2. For the 1st fraction, since 30 × 3 = 90,
    21/30 = 21 × 3/30 × 3 = 63/90
  3. Likewise, for the 2nd fraction, since 9 × 10 = 90,
    4/9 = 4 × 10/9 × 10 = 40/90
  4. Add the two fractions:
    63/90 + 40/90 = 63 + 40/90 = 103/90
  5. So, 21/30 + 4/9 = 103/90
    In mixed form: 113/90

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