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Add 63/5 and 70/21

1st number: 12 3/5, 2nd number: 3 7/21

63/5 + 70/21 is 239/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 5 × 21 = 105,
    63/5 = 63 × 21/5 × 21 = 1323/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    70/21 = 70 × 5/21 × 5 = 350/105
  4. Add the two like fractions:
    1323/105 + 350/105 = 1323 + 350/105 = 1673/105
  5. 1673/105 simplified gives 239/15
  6. So, 63/5 + 70/21 = 239/15
    In mixed form: 1514/15

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