Answers

Add 20/81 and 80/35

1^st number: 20/81, 2^nd number: 2 10/35

20/81 + 80/35 is 1436/567.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 35 is 2835
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2835
2. For the 1st fraction, since 81 × 35 = 2835,
   20/81 = 20 × 35/81 × 35 = 700/2835
3. Likewise, for the 2nd fraction, since 35 × 81 = 2835,
   80/35 = 80 × 81/35 × 81 = 6480/2835
4. Add the two like fractions:
   700/2835 + 6480/2835 = 700 + 6480/2835 = 7180/2835
5. 7180/2835 simplified gives 1436/567
6. So, 20/81 + 80/35 = 1436/567
   In mixed form: 2302/567

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