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Add 84/18 and 1/21

1st number: 4 12/18, 2nd number: 1/21

84/18 + 1/21 is 33/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 21 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    84/18 = 84 × 7/18 × 7 = 588/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    1/21 = 1 × 6/21 × 6 = 6/126
  4. Add the two like fractions:
    588/126 + 6/126 = 588 + 6/126 = 594/126
  5. 594/126 simplified gives 33/7
  6. So, 84/18 + 1/21 = 33/7
    In mixed form: 45/7

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