номер 2

№ 2:

1. \(\frac34=\frac{15}{20}\), \(\frac25=\frac8{20}\), значит
   \[ \frac34>\frac25. \]

2. \(\frac12=\frac5{10}\), \(\frac95=\frac{18}{10}\), значит
   \[ \frac12<\frac95. \]

3. \(\frac{13}{10}=\frac{39}{30}\), \(\frac8{15}=\frac{16}{30}\), значит
   \[ \frac{13}{10}>\frac8{15}. \]

4. \(\frac9{16}=\frac{45}{80}\), \(\frac{11}{20}=\frac{44}{80}\), значит
   \[ \frac9{16}>\frac{11}{20}. \]

5. \(\frac5{14}=\frac{15}{42}\), \(\frac2{21}=\frac4{42}\), значит
   \[ \frac5{14}>\frac2{21}. \]