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Add 12/21 and 18/9

1st number: 12/21, 2nd number: 2 0/9

12/21 + 18/9 is 18/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    12/21 = 12 × 3/21 × 3 = 36/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    18/9 = 18 × 7/9 × 7 = 126/63
  4. Add the two fractions:
    36/63 + 126/63 = 36 + 126/63 = 162/63
  5. After reducing the fraction, the answer is 18/7
  6. In mixed form: 24/7

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