Answers

Add 84/63 and 12/18

1^st number: 1 21/63, 2^nd number: 12/18

84/63 + 12/18 is 2/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   84/63 = 84 × 2/63 × 2 = 168/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   12/18 = 12 × 7/18 × 7 = 84/126
4. Add the two like fractions:
   168/126 + 84/126 = 168 + 84/126 = 252/126
5. 252/126 simplified gives 2/1
6. So, 84/63 + 12/18 = 2/1

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