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Add 18/21 and 54/84

18/21 + 54/84 is 3/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 84 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    18/21 = 18 × 4/21 × 4 = 72/84
  3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
    54/84 = 54 × 1/84 × 1 = 54/84
  4. Add the two like fractions:
    72/84 + 54/84 = 72 + 54/84 = 126/84
  5. 126/84 simplified gives 3/2
  6. So, 18/21 + 54/84 = 3/2
    In mixed form: 11/2

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