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Add 81/20 and 15/45

1st number: 4 1/20, 2nd number: 15/45

81/20 + 15/45 is 263/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    81/20 = 81 × 9/20 × 9 = 729/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    15/45 = 15 × 4/45 × 4 = 60/180
  4. Add the two like fractions:
    729/180 + 60/180 = 729 + 60/180 = 789/180
  5. 789/180 simplified gives 263/60
  6. So, 81/20 + 15/45 = 263/60
    In mixed form: 423/60

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