Answer:
3 repeating digits in this answer and the simplified fraction would be 536/999. Remember that you can make a repeating decimal out of a fraction where the denominator is 9, or 99, or 999 or 90, etc. I won't go over the rules because it is a bit complicated but you should research this if you think it's good to know. For example 2/9 is 0.2222222222222222222222 etc. 234/999 would be 0.234234234234234234234 etc.
Explanation: