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Add 21/84 and 84/63

1st number: 21/84, 2nd number: 1 21/63

21/84 + 84/63 is 19/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 63 is 252
  2. For the 1st fraction, since 84 × 3 = 252,
    21/84 = 21 × 3/84 × 3 = 63/252
  3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
    84/63 = 84 × 4/63 × 4 = 336/252
  4. Add the two fractions:
    63/252 + 336/252 = 63 + 336/252 = 399/252
  5. 399/252 simplified gives 19/12
  6. So, 21/84 + 84/63 = 19/12
    In mixed form: 17/12

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