You just have to add or subtract the percent of a number from the original 
A) 5percent of 40=2 ( 0.05*40) 
Since it’s increase add 2 to 40=42
F) 40percent of 25= 10 (0.4* 25)
25-10=15 
        
             
        
        
        
Do you have a picture or something to accompany the question? 
        
             
        
        
        
Answer:
Step-by-step explanation:
The graph shows you the value stored on the card dropped by $14 when Gina rented 4 videos. Thus the cost of each one is ...
... $14/4 = $3.50
Gina now has $84 on the card, so can rent an additional ...
... $84/$3.50 = 24 . . . . videos
_____
Division is a way to do "repeated subtraction." That is, if we were to subtract $3.50 from $84 repeatedly, we would find we could do it 24 times.
 
        
             
        
        
        
I think its probaly going to be 6
        
                    
             
        
        
        
Your answer is b so there you go have a great day!!!!