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Add 81/4 and 21/30

1st number: 20 1/4, 2nd number: 21/30

81/4 + 21/30 is 419/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 30 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 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  4. Add the two like fractions:
    1215/60 + 42/60 = 1215 + 42/60 = 1257/60
  5. 1257/60 simplified gives 419/20
  6. So, 81/4 + 21/30 = 419/20
    In mixed form: 2019/20

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