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Add 21/84 and 63/5

1st number: 21/84, 2nd number: 12 3/5

21/84 + 63/5 is 257/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 5 is 420
  2. For the 1st fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  3. Likewise, for the 2nd fraction, since 5 × 84 = 420,
    63/5 = 63 × 84/5 × 84 = 5292/420
  4. Add the two fractions:
    105/420 + 5292/420 = 105 + 5292/420 = 5397/420
  5. After reducing the fraction, the answer is 257/20
  6. In mixed form: 1217/20

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