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Add 18/21 and 21/7

1st number: 18/21, 2nd number: 3 0/7

18/21 + 21/7 is 27/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21
  2. For the 1st fraction, since 21 × 1 = 21,
    18/21 = 18 × 1/21 × 1 = 18/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    21/7 = 21 × 3/7 × 3 = 63/21
  4. Add the two fractions:
    18/21 + 63/21 = 18 + 63/21 = 81/21
  5. After reducing the fraction, the answer is 27/7
  6. In mixed form: 36/7

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