Answers

Add 90/81 and 10/16

1^st number: 1 9/81, 2^nd number: 10/16

90/81 + 10/16 is 125/72.

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,
   90/81 = 90 × 16/81 × 16 = 1440/1296
3. Likewise, for the 2nd fraction, since 16 × 81 = 1296,
   10/16 = 10 × 81/16 × 81 = 810/1296
4. Add the two like fractions:
   1440/1296 + 810/1296 = 1440 + 810/1296 = 2250/1296
5. 2250/1296 simplified gives 125/72
6. So, 90/81 + 10/16 = 125/72
   In mixed form: 153/72

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