Answers

Add 84/28 and 12/63

1^st number: 3 0/28, 2^nd number: 12/63

84/28 + 12/63 is 67/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 28 × 9 = 252,
   84/28 = 84 × 9/28 × 9 = 756/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   12/63 = 12 × 4/63 × 4 = 48/252
4. Add the two like fractions:
   756/252 + 48/252 = 756 + 48/252 = 804/252
5. 804/252 simplified gives 67/21
6. So, 84/28 + 12/63 = 67/21
   In mixed form: 34/21

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