Hello!
[tex]\frac{4}{9}-\frac{2}{9}[/tex]
First you had to used apply rule -(-b)=b
[tex]\frac{4}{9}+\frac{2}{9}[/tex]
Since the denominators are equal to it should be combine by the fractions.
[tex]\frac{4+2}{9}[/tex]
Then add 4+2=6
[tex]\frac{6}{9}[/tex]
[tex]\frac{4}{9}-\frac{-2}{9}[/tex]
Finally you had to cancel by the common factor of 3.
[tex]=Answer--->\frac{2}{3}[/tex]
Hope this helps! And thank you for posting at here on Brainly. And have a great day! -Charlie :)