Answers

Add 81/12 and 90/8

1^st number: 6 9/12, 2^nd number: 11 2/8

81/12 + 90/8 is 18/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 8 is 24
   
   Next, find the equivalent fraction of both fractional numbers with denominator 24
2. For the 1st fraction, since 12 × 2 = 24,
   81/12 = 81 × 2/12 × 2 = 162/24
3. Likewise, for the 2nd fraction, since 8 × 3 = 24,
   90/8 = 90 × 3/8 × 3 = 270/24
4. Add the two like fractions:
   162/24 + 270/24 = 162 + 270/24 = 432/24
5. 432/24 simplified gives 18/1
6. So, 81/12 + 90/8 = 18/1

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