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Add 21/4 and 28/80

1st number: 5 1/4, 2nd number: 28/80

21/4 + 28/80 is 28/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 4 × 20 = 80,
    21/4 = 21 × 20/4 × 20 = 420/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    28/80 = 28 × 1/80 × 1 = 28/80
  4. Add the two like fractions:
    420/80 + 28/80 = 420 + 28/80 = 448/80
  5. 448/80 simplified gives 28/5
  6. So, 21/4 + 28/80 = 28/5
    In mixed form: 53/5

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