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Add 63/4 and 70/21

1st number: 15 3/4, 2nd number: 3 7/21

63/4 + 70/21 is 229/12.

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,
    70/21 = 70 × 4/21 × 4 = 280/84
  4. Add the two like fractions:
    1323/84 + 280/84 = 1323 + 280/84 = 1603/84
  5. 1603/84 simplified gives 229/12
  6. So, 63/4 + 70/21 = 229/12
    In mixed form: 191/12

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