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Add 42/2 and 45/12

1st number: 21 0/2, 2nd number: 3 9/12

42/2 + 45/12 is 99/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 12 is 12

    Next, find the equivalent fraction of both fractional numbers with denominator 12
  2. For the 1st fraction, since 2 × 6 = 12,
    42/2 = 42 × 6/2 × 6 = 252/12
  3. Likewise, for the 2nd fraction, since 12 × 1 = 12,
    45/12 = 45 × 1/12 × 1 = 45/12
  4. Add the two like fractions:
    252/12 + 45/12 = 252 + 45/12 = 297/12
  5. 297/12 simplified gives 99/4
  6. So, 42/2 + 45/12 = 99/4
    In mixed form: 243/4

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