Answers

Add 10/81 and 6/80

10/81 + 6/80 is 643/3240.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 80 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 81 × 80 = 6480,
   10/81 = 10 × 80/81 × 80 = 800/6480
3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
   6/80 = 6 × 81/80 × 81 = 486/6480
4. Add the two like fractions:
   800/6480 + 486/6480 = 800 + 486/6480 = 1286/6480
5. 1286/6480 simplified gives 643/3240
6. So, 10/81 + 6/80 = 643/3240

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