Answers

Add 90/81 and 20/30

1^st number: 1 9/81, 2^nd number: 20/30

90/81 + 20/30 is 16/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 30 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   90/81 = 90 × 10/81 × 10 = 900/810
3. Likewise, for the 2nd fraction, since 30 × 27 = 810,
   20/30 = 20 × 27/30 × 27 = 540/810
4. Add the two like fractions:
   900/810 + 540/810 = 900 + 540/810 = 1440/810
5. 1440/810 simplified gives 16/9
6. So, 90/81 + 20/30 = 16/9
   In mixed form: 17/9

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