Answers

Add 27/12 and 40/21

1^st number: 2 3/12, 2^nd number: 1 19/21

27/12 + 40/21 is 349/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   27/12 = 27 × 7/12 × 7 = 189/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   40/21 = 40 × 4/21 × 4 = 160/84
4. Add the two like fractions:
   189/84 + 160/84 = 189 + 160/84 = 349/84
5. So, 27/12 + 40/21 = 349/84
   In mixed form: 413/84

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