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Add 45/12 and 5/40

1st number: 3 9/12, 2nd number: 5/40

45/12 + 5/40 is 31/8.

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,
    45/12 = 45 × 10/12 × 10 = 450/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    5/40 = 5 × 3/40 × 3 = 15/120
  4. Add the two like fractions:
    450/120 + 15/120 = 450 + 15/120 = 465/120
  5. 465/120 simplified gives 31/8
  6. So, 45/12 + 5/40 = 31/8
    In mixed form: 37/8

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