Answer:
2/9
Explanation:
So you need to have a common denominator to be able to subtract the fractions.
The common denominator is 18 because 9 and 6 both go into 18.
You also have to multiply the numerator by the same number as the denominator.
Once you have done that, you can subtract the fractions.
I recommend watching a you tube video for an in depth explanation :)