6/7 = ?/91

What is the missing number?

 

?/9 = 35/63

What is the missing number?

 

?/7 = 30/42

What is the missing number?

 

7/8 = ?/40

What is the missing number?

 

5/9 = ?/27

What is the missing number?

 

3/10 = ?/20

What is the missing number?