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Add 20/21 and 6/8

20/21 + 6/8 is 143/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 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 8 × 21 = 168,
    6/8 = 6 × 21/8 × 21 = 126/168
  4. Add the two fractions:
    160/168 + 126/168 = 160 + 126/168 = 286/168
  5. After reducing the fraction, the answer is 143/84
  6. In mixed form: 159/84

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