نعم

لا

$$\frac{1}{2}$$  

$$\frac{3}{4}$$  

$$\frac{4}{5}$$  

$$\frac{8}{10}$$  

$$\frac{2}{4}=\frac{3}{5}=\frac{4}{8}$$  

$$\frac{2}{5}=\frac{3}{6}=\frac{4}{8}$$  

$$\frac{2}{4}=\frac{4}{8}=\frac{8}{16}$$  

$$\frac{2}{4}=\frac{3}{6}=\frac{4}{10}$$  

$$\frac{1}{2}$$  

$$\frac{3}{4}$$  

$$\frac{4}{5}$$  

$$\frac{8}{10}$$