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Add 45/21 and 81/5

1st number: 2 3/21, 2nd number: 16 1/5

45/21 + 81/5 is 642/35.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    45/21 = 45 × 5/21 × 5 = 225/105
  3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
    81/5 = 81 × 21/5 × 21 = 1701/105
  4. Add the two like fractions:
    225/105 + 1701/105 = 225 + 1701/105 = 1926/105
  5. 1926/105 simplified gives 642/35
  6. So, 45/21 + 81/5 = 642/35
    In mixed form: 1812/35

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