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Add 20/12 and 42/18

1st number: 1 8/12, 2nd number: 2 6/18

20/12 + 42/18 is 4/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 18 is 36
  2. For the 1st fraction, since 12 × 3 = 36,
    20/12 = 20 × 3/12 × 3 = 60/36
  3. Likewise, for the 2nd fraction, since 18 × 2 = 36,
    42/18 = 42 × 2/18 × 2 = 84/36
  4. Add the two fractions:
    60/36 + 84/36 = 60 + 84/36 = 144/36
  5. After reducing the fraction, the answer is 4/1

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