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Add 40/42 and 21/12

1st number: 40/42, 2nd number: 1 9/12

40/42 + 21/12 is 227/84.

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,
    40/42 = 40 × 2/42 × 2 = 80/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    21/12 = 21 × 7/12 × 7 = 147/84
  4. Add the two fractions:
    80/84 + 147/84 = 80 + 147/84 = 227/84
  5. So, 40/42 + 21/12 = 227/84
    In mixed form: 259/84

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