Inch ruler measurements and fractions

What is the missing number?

 $\frac{4}{16}=\ \frac{ }{4}$  

What is the missing number?

 $\frac{4}{16}=\ \frac{1}{ }$  

What is the missing number?

 $\frac{4}{16}=\ \frac{ }{8}$  

What is the missing number?

 $\frac{8}{16}=\ \frac{ }{8}$  

What is the missing number?

 $\frac{8}{16}=\ \frac{ }{2}$  

What is the missing number?

 $\frac{8}{ }=\ \frac{1}{2}$  

What is the missing number?

 $\frac{ }{16}=\ \frac{1}{4}$  

What is the missing number?

 $\frac{ }{16}=\ \frac{3}{4}$  

What is the missing number?

 $\frac{12}{16}=\ \frac{ }{8}=\frac{3}{4}$  

What is the missing number?

 $\frac{14}{16}=\ \frac{ }{8}$