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Add 3/42 and 45/54

3/42 + 45/54 is 19/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    3/42 = 3 × 9/42 × 9 = 27/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    45/54 = 45 × 7/54 × 7 = 315/378
  4. Add the two like fractions:
    27/378 + 315/378 = 27 + 315/378 = 342/378
  5. 342/378 simplified gives 19/21
  6. So, 3/42 + 45/54 = 19/21

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