Answer:
0.6428571
Explanation:
First, divide 9 by 14 to get 0.6428571428571
There is a pattern here. Notice how after "428571", the sequence repeats again with another "429571" - I've bolded it and underlined it to show the relationship.
Now, remove the bolded and underlined section. Draw a straight line over the "428571" in your decimal.
This is a recurring decimal.