27
18
----
45
GCF of 45 = 15 
Here is a word document on Greatest Common Factors and how to solve it.
 
        
        
        
Answer:
We will use;
21 parts oil
14 parts soy sauce 
7 parts Orange 
Step-by-step explanation:
We can have all of these as a ratio
That would be;
3 + 2 + 1 = 6
For oil
3/6 * 42 = 21 parts of oil
For Soy sauce 
= 2/6 * 42 = 14 parts soy sauce 
For Orange 
= 1/6 * 42 = 7 parts orange juice 
 
        
                    
             
        
        
        
Answer:
5+(-5)=0
-2+2=0
Step-by-step explanation: