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Add 20/84 and 42/12

1st number: 20/84, 2nd number: 3 6/12

20/84 + 42/12 is 157/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 12 is 84
  2. For the 1st fraction, since 84 × 1 = 84,
    20/84 = 20 × 1/84 × 1 = 20/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    42/12 = 42 × 7/12 × 7 = 294/84
  4. Add the two fractions:
    20/84 + 294/84 = 20 + 294/84 = 314/84
  5. 314/84 simplified gives 157/42
  6. So, 20/84 + 42/12 = 157/42
    In mixed form: 331/42

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