\(\frac{23}{30};\frac{39}{45};\frac{13}{18}\) MSC :90
Ta có \(\frac{23}{30}=\frac{23\cdot3}{30\cdot3}=\frac{69}{90}\)
\(\frac{39}{45}=\frac{39\cdot2}{35\cdot2}=\frac{78}{90}\)
\(\frac{13}{18}=\frac{13\cdot5}{18\cdot5}=\frac{65}{90}\)
Mà \(\frac{78}{90}>\frac{69}{90}>\frac{54}{90}\)
\(\Rightarrow\frac{39}{45}>\frac{23}{30}>\frac{13}{18}\)
hok tốt ....