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Add 4/7 and 5/9

4/7 + 5/9 is 71/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 9 is 63
  2. For the 1st fraction, since 7 × 9 = 63,
    4/7 = 4 × 9/7 × 9 = 36/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    5/9 = 5 × 7/9 × 7 = 35/63
  4. Add the two fractions:
    36/63 + 35/63 = 36 + 35/63 = 71/63
  5. In mixed form: 18/63

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