Answers

Add 24/21 and 45/12

1^st number: 1 3/21, 2^nd number: 3 9/12

24/21 + 45/12 is 137/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   24/21 = 24 × 4/21 × 4 = 96/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   45/12 = 45 × 7/12 × 7 = 315/84
4. Add the two like fractions:
   96/84 + 315/84 = 96 + 315/84 = 411/84
5. 411/84 simplified gives 137/28
6. So, 24/21 + 45/12 = 137/28
   In mixed form: 425/28

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