Answers

Add 21/84 and 84/9

1^st number: 21/84, 2^nd number: 9 3/9

21/84 + 84/9 is 115/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 9 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   21/84 = 21 × 3/84 × 3 = 63/252
3. Likewise, for the 2nd fraction, since 9 × 28 = 252,
   84/9 = 84 × 28/9 × 28 = 2352/252
4. Add the two like fractions:
   63/252 + 2352/252 = 63 + 2352/252 = 2415/252
5. 2415/252 simplified gives 115/12
6. So, 21/84 + 84/9 = 115/12
   In mixed form: 97/12

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