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Add 8/20 and 6/21

8/20 + 6/21 is 24/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420
  2. For the 1st fraction, since 20 × 21 = 420,
    8/20 = 8 × 21/20 × 21 = 168/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    6/21 = 6 × 20/21 × 20 = 120/420
  4. Add the two fractions:
    168/420 + 120/420 = 168 + 120/420 = 288/420
  5. After reducing the fraction, the answer is 24/35

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