Answers

Add 7/81 and 40/8

1^st number: 7/81, 2^nd number: 5 0/8

7/81 + 40/8 is 412/81.

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,
   7/81 = 7 × 8/81 × 8 = 56/648
3. Likewise, for the 2nd fraction, since 8 × 81 = 648,
   40/8 = 40 × 81/8 × 81 = 3240/648
4. Add the two like fractions:
   56/648 + 3240/648 = 56 + 3240/648 = 3296/648
5. 3296/648 simplified gives 412/81
6. So, 7/81 + 40/8 = 412/81
   In mixed form: 57/81

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