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Add 18/12 and 8/21

1st number: 1 6/12, 2nd number: 8/21

18/12 + 8/21 is 79/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    18/12 = 18 × 7/12 × 7 = 126/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    8/21 = 8 × 4/21 × 4 = 32/84
  4. Add the two fractions:
    126/84 + 32/84 = 126 + 32/84 = 158/84
  5. After reducing the fraction, the answer is 79/42
  6. In mixed form: 137/42

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