Answers

Add 81/63 and 6/18

1^st number: 1 18/63, 2^nd number: 6/18

81/63 + 6/18 is 34/21.

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,
   81/63 = 81 × 2/63 × 2 = 162/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   6/18 = 6 × 7/18 × 7 = 42/126
4. Add the two like fractions:
   162/126 + 42/126 = 162 + 42/126 = 204/126
5. 204/126 simplified gives 34/21
6. So, 81/63 + 6/18 = 34/21
   In mixed form: 113/21

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