Simple...
you have: [tex]4 \frac{4}{9} [/tex]
To make this into an improper fraction-->>
1.) Multiply whole number by denominator
2.)Add the number you got plus the numerator
3.) Use the original denominator to finish your improper fraction
Example: [tex] 4\frac{4}{9} [/tex]
4*9=36
36+4=40
[tex] \frac{40}{9} [/tex]
Thus, your answer.