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Add 63/4 and 84/21

1st number: 15 3/4, 2nd number: 4 0/21

63/4 + 84/21 is 79/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 4 × 21 = 84,
    63/4 = 63 × 21/4 × 21 = 1323/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    84/21 = 84 × 4/21 × 4 = 336/84
  4. Add the two like fractions:
    1323/84 + 336/84 = 1323 + 336/84 = 1659/84
  5. 1659/84 simplified gives 79/4
  6. So, 63/4 + 84/21 = 79/4
    In mixed form: 193/4

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