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Add 21/2 and 80/5

1st number: 10 1/2, 2nd number: 16 0/5

21/2 + 80/5 is 53/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 5 is 10

    Next, find the equivalent fraction of both fractional numbers with denominator 10
  2. For the 1st fraction, since 2 × 5 = 10,
    21/2 = 21 × 5/2 × 5 = 105/10
  3. Likewise, for the 2nd fraction, since 5 × 2 = 10,
    80/5 = 80 × 2/5 × 2 = 160/10
  4. Add the two like fractions:
    105/10 + 160/10 = 105 + 160/10 = 265/10
  5. 265/10 simplified gives 53/2
  6. So, 21/2 + 80/5 = 53/2
    In mixed form: 261/2

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