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Add 81/4 and 80/5

1st number: 20 1/4, 2nd number: 16 0/5

81/4 + 80/5 is 145/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    81/4 = 81 × 5/4 × 5 = 405/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    80/5 = 80 × 4/5 × 4 = 320/20
  4. Add the two like fractions:
    405/20 + 320/20 = 405 + 320/20 = 725/20
  5. 725/20 simplified gives 145/4
  6. So, 81/4 + 80/5 = 145/4
    In mixed form: 361/4

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