Answers

Add 12/84 and 70/18

1^st number: 12/84, 2^nd number: 3 16/18

12/84 + 70/18 is 254/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 18 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   12/84 = 12 × 3/84 × 3 = 36/252
3. Likewise, for the 2nd fraction, since 18 × 14 = 252,
   70/18 = 70 × 14/18 × 14 = 980/252
4. Add the two like fractions:
   36/252 + 980/252 = 36 + 980/252 = 1016/252
5. 1016/252 simplified gives 254/63
6. So, 12/84 + 70/18 = 254/63
   In mixed form: 42/63

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