Answers

Add 3/12 and 25/21

1^st number: 3/12, 2^nd number: 1 4/21

3/12 + 25/21 is 121/84.

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,
   3/12 = 3 × 7/12 × 7 = 21/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   25/21 = 25 × 4/21 × 4 = 100/84
4. Add the two like fractions:
   21/84 + 100/84 = 21 + 100/84 = 121/84
5. So, 3/12 + 25/21 = 121/84
   In mixed form: 137/84

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