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Add 15/7 and 21/9

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

15/7 + 21/9 is 94/21.

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,
    15/7 = 15 × 9/7 × 9 = 135/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    21/9 = 21 × 7/9 × 7 = 147/63
  4. Add the two fractions:
    135/63 + 147/63 = 135 + 147/63 = 282/63
  5. After reducing the fraction, the answer is 94/21
  6. In mixed form: 410/21

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