Answers

Add 3/7 and 3/9

3/7 + 3/9 is 16/21.

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,
   3/7 = 3 × 9/7 × 9 = 27/63
3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
   3/9 = 3 × 7/9 × 7 = 21/63
4. Add the two fractions:
   27/63 + 21/63 = 27 + 21/63 = 48/63
5. After reducing the fraction, the answer is 16/21

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