Repeating to infinity

How do I express 0.99999999… as a fraction? (nine repeating)
Another questions:
Can you write .9999 repeating as a fraction?
How do you turn 0.9 repeating into a fraction?

Correct answer:

a =  1

Step-by-step explanation:

a = 0.999999999  10a = 9.999999999 10a  a = 9.999999999  0.999999999 10a  a = 9 9a = 9  a=99=1



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