I need help ASAP! I will give 30pts to the person that has the best, and correct answer.

Answer:
The answer is the square root (√) of 8/9
Step-by-step explanation:
The fraction is 64/81, and if you find the square root of 64 and 81 respectively, the numbers are 8 and 9. So, the square root of 64/81 is 8/9.