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Add 72/7 and 84/9

1st number: 10 2/7, 2nd number: 9 3/9

72/7 + 84/9 is 412/21.

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,
    72/7 = 72 × 9/7 × 9 = 648/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    84/9 = 84 × 7/9 × 7 = 588/63
  4. Add the two fractions:
    648/63 + 588/63 = 648 + 588/63 = 1236/63
  5. 1236/63 simplified gives 412/21
  6. So, 72/7 + 84/9 = 412/21
    In mixed form: 1913/21

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