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Add 81/30 and 5/8

1st number: 2 21/30, 2nd number: 5/8

81/30 + 5/8 is 133/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 30 × 4 = 120,
    81/30 = 81 × 4/30 × 4 = 324/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    5/8 = 5 × 15/8 × 15 = 75/120
  4. Add the two like fractions:
    324/120 + 75/120 = 324 + 75/120 = 399/120
  5. 399/120 simplified gives 133/40
  6. So, 81/30 + 5/8 = 133/40
    In mixed form: 313/40

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