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Add 84/21 and 15/84

1st number: 4 0/21, 2nd number: 15/84

84/21 + 15/84 is 117/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 84 is 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 84 × 1 = 84,
    15/84 = 15 × 1/84 × 1 = 15/84
  4. Add the two fractions:
    336/84 + 15/84 = 336 + 15/84 = 351/84
  5. 351/84 simplified gives 117/28
  6. So, 84/21 + 15/84 = 117/28
    In mixed form: 45/28

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