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Add 81/4 and 21/15

1st number: 20 1/4, 2nd number: 1 6/15

81/4 + 21/15 is 433/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 15 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 4 × 15 = 60,
    81/4 = 81 × 15/4 × 15 = 1215/60
  3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
    21/15 = 21 × 4/15 × 4 = 84/60
  4. Add the two like fractions:
    1215/60 + 84/60 = 1215 + 84/60 = 1299/60
  5. 1299/60 simplified gives 433/20
  6. So, 81/4 + 21/15 = 433/20
    In mixed form: 2113/20

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