" of " means multiply
1/4 * 3.20/1...and just multiply....(1 * 3.20) / (4 * 1) = 3.20/4 = 0.8
or
1/4 = 0.25.....0.25(3.20) = 0.8
        
                    
             
        
        
        
Answer:
you got this
Step-by-step explanation:
goodluck
 
        
             
        
        
        
18).  16:80 is the ratio but in simplest form is; 5:0
19).   36:54 is the ratio but in simplest form is; 2:3
20).   12:24 is the ratio but in simplest form is; 1:2
hope that helps:D
 
        
             
        
        
        
Answer:
8409 es 8×10³ es 8 4×10² es 4 0×10¹ es 4 9×10⁰ es 9
 
        
             
        
        
        
Draw a number line with 10 positives and 10 negatives. Count from 0 to 8. Now, from 8, count back 12 spots. From that spot, go back to 0, which is their original position. The number you counted there is your answer.