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Add 80/21 and 3/12

1st number: 3 17/21, 2nd number: 3/12

80/21 + 3/12 is 341/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    80/21 = 80 × 4/21 × 4 = 320/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    3/12 = 3 × 7/12 × 7 = 21/84
  4. Add the two like fractions:
    320/84 + 21/84 = 320 + 21/84 = 341/84
  5. So, 80/21 + 3/12 = 341/84
    In mixed form: 45/84

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