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Add 81/18 and 5/20

1st number: 4 9/18, 2nd number: 5/20

81/18 + 5/20 is 19/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 18 × 10 = 180,
    81/18 = 81 × 10/18 × 10 = 810/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    5/20 = 5 × 9/20 × 9 = 45/180
  4. Add the two like fractions:
    810/180 + 45/180 = 810 + 45/180 = 855/180
  5. 855/180 simplified gives 19/4
  6. So, 81/18 + 5/20 = 19/4
    In mixed form: 43/4

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