Answers

Add 9/80 and 1/81

9/80 + 1/81 is 809/6480.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   9/80 = 9 × 81/80 × 81 = 729/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   1/81 = 1 × 80/81 × 80 = 80/6480
4. Add the two like fractions:
   729/6480 + 80/6480 = 729 + 80/6480 = 809/6480
5. So, 9/80 + 1/81 = 809/6480

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