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Add 28/40 and 81/84

28/40 + 81/84 is 233/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 84 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    28/40 = 28 × 21/40 × 21 = 588/840
  3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
    81/84 = 81 × 10/84 × 10 = 810/840
  4. Add the two like fractions:
    588/840 + 810/840 = 588 + 810/840 = 1398/840
  5. 1398/840 simplified gives 233/140
  6. So, 28/40 + 81/84 = 233/140
    In mixed form: 193/140

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