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Add 84/21 and 15/12

1st number: 4 0/21, 2nd number: 1 3/12

84/21 + 15/12 is 21/4.

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,
    84/21 = 84 × 4/21 × 4 = 336/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    15/12 = 15 × 7/12 × 7 = 105/84
  4. Add the two like fractions:
    336/84 + 105/84 = 336 + 105/84 = 441/84
  5. 441/84 simplified gives 21/4
  6. So, 84/21 + 15/12 = 21/4
    In mixed form: 51/4

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