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Add 15/12 and 81/40

1st number: 1 3/12, 2nd number: 2 1/40

15/12 + 81/40 is 131/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 12 × 10 = 120,
    15/12 = 15 × 10/12 × 10 = 150/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    81/40 = 81 × 3/40 × 3 = 243/120
  4. Add the two like fractions:
    150/120 + 243/120 = 150 + 243/120 = 393/120
  5. 393/120 simplified gives 131/40
  6. So, 15/12 + 81/40 = 131/40
    In mixed form: 311/40

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