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Add 28/56 and 4/21

28/56 + 4/21 is 29/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 21 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 56 × 3 = 168,
    28/56 = 28 × 3/56 × 3 = 84/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    4/21 = 4 × 8/21 × 8 = 32/168
  4. Add the two like fractions:
    84/168 + 32/168 = 84 + 32/168 = 116/168
  5. 116/168 simplified gives 29/42
  6. So, 28/56 + 4/21 = 29/42

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