Answers

Add 60/81 and 12/80

60/81 + 12/80 is 481/540.

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,
   60/81 = 60 × 80/81 × 80 = 4800/6480
3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
   12/80 = 12 × 81/80 × 81 = 972/6480
4. Add the two like fractions:
   4800/6480 + 972/6480 = 4800 + 972/6480 = 5772/6480
5. 5772/6480 simplified gives 481/540
6. So, 60/81 + 12/80 = 481/540

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