Answers

Add 8/21 and 84/12

1^st number: 8/21, 2^nd number: 7 0/12

8/21 + 84/12 is 155/21.

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,
   8/21 = 8 × 4/21 × 4 = 32/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   84/12 = 84 × 7/12 × 7 = 588/84
4. Add the two like fractions:
   32/84 + 588/84 = 32 + 588/84 = 620/84
5. 620/84 simplified gives 155/21
6. So, 8/21 + 84/12 = 155/21
   In mixed form: 78/21

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