0.66 repeating as a fraction

If u have repeating decimals ...

0.6 (with the 6 repeating) ... if there is 1 number repeating, u put that number over 9 ... 6/9

0.67. (with the 67 repeating) ... if there is 2 numbers repeating, u put those 2 numbers over 99 ... 67/99

0.678 (with the 678 repeating) ... if there is 3 numbers repeating, u put those 3 numbers over 999 ... 678/999

2

_

3

(two - thirds) is the answer