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Add 84/18 and 30/21

1st number: 4 12/18, 2nd number: 1 9/21

84/18 + 30/21 is 128/21.

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,
    30/21 = 30 × 6/21 × 6 = 180/126
  4. Add the two like fractions:
    588/126 + 180/126 = 588 + 180/126 = 768/126
  5. 768/126 simplified gives 128/21
  6. So, 84/18 + 30/21 = 128/21
    In mixed form: 62/21

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