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Add 42/84 and 15/18

42/84 + 15/18 is 4/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 18 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 84 × 3 = 252,
    42/84 = 42 × 3/84 × 3 = 126/252
  3. Likewise, for the 2nd fraction, since 18 × 14 = 252,
    15/18 = 15 × 14/18 × 14 = 210/252
  4. Add the two like fractions:
    126/252 + 210/252 = 126 + 210/252 = 336/252
  5. 336/252 simplified gives 4/3
  6. So, 42/84 + 15/18 = 4/3
    In mixed form: 11/3

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