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Add 81/8 and 12/30

1st number: 10 1/8, 2nd number: 12/30

81/8 + 12/30 is 421/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 8 × 15 = 120,
    81/8 = 81 × 15/8 × 15 = 1215/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    12/30 = 12 × 4/30 × 4 = 48/120
  4. Add the two like fractions:
    1215/120 + 48/120 = 1215 + 48/120 = 1263/120
  5. 1263/120 simplified gives 421/40
  6. So, 81/8 + 12/30 = 421/40
    In mixed form: 1021/40

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