Answers

Add 1/81 and 54/8

1^st number: 1/81, 2^nd number: 6 6/8

1/81 + 54/8 is 2191/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 8 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 81 × 8 = 648,
   1/81 = 1 × 8/81 × 8 = 8/648
3. Likewise, for the 2nd fraction, since 8 × 81 = 648,
   54/8 = 54 × 81/8 × 81 = 4374/648
4. Add the two like fractions:
   8/648 + 4374/648 = 8 + 4374/648 = 4382/648
5. 4382/648 simplified gives 2191/324
6. So, 1/81 + 54/8 = 2191/324
   In mixed form: 6247/324

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