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Add 3/42 and 45/84

3/42 + 45/84 is 17/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 84 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    3/42 = 3 × 2/42 × 2 = 6/84
  3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
    45/84 = 45 × 1/84 × 1 = 45/84
  4. Add the two fractions:
    6/84 + 45/84 = 6 + 45/84 = 51/84
  5. After reducing the fraction, the answer is 17/28

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