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Add 20/42 and 3/9

20/42 + 3/9 is 17/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 9 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    20/42 = 20 × 3/42 × 3 = 60/126
  3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
    3/9 = 3 × 14/9 × 14 = 42/126
  4. Add the two like fractions:
    60/126 + 42/126 = 60 + 42/126 = 102/126
  5. 102/126 simplified gives 17/21
  6. So, 20/42 + 3/9 = 17/21

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