Answers

Add 81/42 and 18/63

1^st number: 1 39/42, 2^nd number: 18/63

81/42 + 18/63 is 31/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 63 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   81/42 = 81 × 3/42 × 3 = 243/126
3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
   18/63 = 18 × 2/63 × 2 = 36/126
4. Add the two like fractions:
   243/126 + 36/126 = 243 + 36/126 = 279/126
5. 279/126 simplified gives 31/14
6. So, 81/42 + 18/63 = 31/14
   In mixed form: 23/14

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