Ta có:
\(\frac{4}{5}=\frac{576}{720}\)
\(\frac{9}{15}=\frac{432}{720}\)
\(\frac{9}{8}=\frac{810}{720}\)
\(\frac{8}{9}=\frac{640}{720}\)
Vì \(432< 576< 640< 810\)
\(\Rightarrow\frac{432}{720}< \frac{576}{720}< \frac{640}{720}< \frac{810}{720}\)
\(\Rightarrow\frac{9}{15}< \frac{4}{5}< \frac{8}{9}< \frac{9}{8}\)
HOK TOT