Answers

Add 10/81 and 18/16

1^st number: 10/81, 2^nd number: 1 2/16

10/81 + 18/16 is 809/648.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 16 is 1296
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1296
2. For the 1st fraction, since 81 × 16 = 1296,
   10/81 = 10 × 16/81 × 16 = 160/1296
3. Likewise, for the 2nd fraction, since 16 × 81 = 1296,
   18/16 = 18 × 81/16 × 81 = 1458/1296
4. Add the two like fractions:
   160/1296 + 1458/1296 = 160 + 1458/1296 = 1618/1296
5. 1618/1296 simplified gives 809/648
6. So, 10/81 + 18/16 = 809/648
   In mixed form: 1161/648

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