4/5 + 8/9. First we have to find a common denominator for \(\frac{4}{5}\) and \(\frac{8}{9}\).
\(\\ \frac{4*9}{5*9}= \frac{36}{45} \ and \ \frac{8*5}{9*5}= \frac{40}{45} \\\)
Now we are going to add:\(\frac{36}{45}+ \frac{40}{45}= \frac{76}{45}\)
Make \(\frac{76}{45}\) a mixed number:\(\frac{76}{45}=1 \frac{31}{45}\) So the answer is \(\boxed{1 \frac{31}{45}}\)