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Add 21/7 and 21/9

1st number: 3 0/7, 2nd number: 2 3/9

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

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,
    21/7 = 21 × 9/7 × 9 = 189/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    21/9 = 21 × 7/9 × 7 = 147/63
  4. Add the two fractions:
    189/63 + 147/63 = 189 + 147/63 = 336/63
  5. After reducing the fraction, the answer is 16/3
  6. In mixed form: 51/3

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