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Add 20/21 and 4/56

20/21 + 4/56 is 43/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 56 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    20/21 = 20 × 8/21 × 8 = 160/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    4/56 = 4 × 3/56 × 3 = 12/168
  4. Add the two fractions:
    160/168 + 12/168 = 160 + 12/168 = 172/168
  5. 172/168 simplified gives 43/42
  6. So, 20/21 + 4/56 = 43/42
    In mixed form: 11/42

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