For this case we have the following numbers: 
 

 The relationship of these numbers is given by:
 

 Where, 
 k: proportionality constant 
 Clearing the value of k we have: 
 

 Therefore, this means that the number 0.09 is 10 times larger than the number 0.009 
 Answer: 
 0.09 is 10 times larger than the number 0.009