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Add 20/42 and 9/12

20/42 + 9/12 is 103/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 12 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    20/42 = 20 × 2/42 × 2 = 40/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    9/12 = 9 × 7/12 × 7 = 63/84
  4. Add the two fractions:
    40/84 + 63/84 = 40 + 63/84 = 103/84
  5. In mixed form: 119/84

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