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Add 45/12 and 20/5

1st number: 3 9/12, 2nd number: 4 0/5

45/12 + 20/5 is 31/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 5 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 12 × 5 = 60,
    45/12 = 45 × 5/12 × 5 = 225/60
  3. Likewise, for the 2nd fraction, since 5 × 12 = 60,
    20/5 = 20 × 12/5 × 12 = 240/60
  4. Add the two like fractions:
    225/60 + 240/60 = 225 + 240/60 = 465/60
  5. 465/60 simplified gives 31/4
  6. So, 45/12 + 20/5 = 31/4
    In mixed form: 73/4

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