Answers

Add 40/42 and 21/12

1^st number: 40/42, 2^nd 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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