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Add 12/56 and 4/21

12/56 + 4/21 is 17/42.

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,
    12/56 = 12 × 3/56 × 3 = 36/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    4/21 = 4 × 8/21 × 8 = 32/168
  4. Add the two like fractions:
    36/168 + 32/168 = 36 + 32/168 = 68/168
  5. 68/168 simplified gives 17/42
  6. So, 12/56 + 4/21 = 17/42

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