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Add 63/5 and 90/21

1st number: 12 3/5, 2nd number: 4 6/21

63/5 + 90/21 is 591/35.

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,
    90/21 = 90 × 5/21 × 5 = 450/105
  4. Add the two like fractions:
    1323/105 + 450/105 = 1323 + 450/105 = 1773/105
  5. 1773/105 simplified gives 591/35
  6. So, 63/5 + 90/21 = 591/35
    In mixed form: 1631/35

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