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Add 8/20 and 3/42

8/20 + 3/42 is 33/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 42 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 42 × 10 = 420,
    3/42 = 3 × 10/42 × 10 = 30/420
  4. Add the two fractions:
    168/420 + 30/420 = 168 + 30/420 = 198/420
  5. After reducing the fraction, the answer is 33/70

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