Answers

Add 20/5 and 36/81

1^st number: 4 0/5, 2^nd number: 36/81

20/5 + 36/81 is 40/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   20/5 = 20 × 81/5 × 81 = 1620/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   36/81 = 36 × 5/81 × 5 = 180/405
4. Add the two like fractions:
   1620/405 + 180/405 = 1620 + 180/405 = 1800/405
5. 1800/405 simplified gives 40/9
6. So, 20/5 + 36/81 = 40/9
   In mixed form: 44/9

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