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Add 18/21 and 20/56

18/21 + 20/56 is 17/14.

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,
    18/21 = 18 × 8/21 × 8 = 144/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    20/56 = 20 × 3/56 × 3 = 60/168
  4. Add the two fractions:
    144/168 + 60/168 = 144 + 60/168 = 204/168
  5. After reducing the fraction, the answer is 17/14
  6. In mixed form: 13/14

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