Huh? 
You forgot something.
        
             
        
        
        
Answer:
$100 increase
Step-by-step explanation:
500 x 20%
= $100 increase
 
        
                    
             
        
        
        
Answer:
No 
Step-by-step explanation:
Does anyone have to do DELTA-MATH
 
        
                    
             
        
        
        
We first calculate the percentage increase on the tax
Old value = 25×9 = 225 ⇒ The value 9 represents the 9 lots of thousands of the house's value
New value = 28×9 = 252
Increase in tax = 252 - 225 =27  
Percentage increase = (27÷225) ×100 = 12%
The amount of yearly rent would be then increased by 12%
Monthly rent = $60
Yearly rent = 60×12 = $720
Increase by 12% = 720×1.12 = 806.4 ⇒ The value 1.12 is the multiplier, obtained from 100%+12%=112%=1.12
The monthly rent is 806.4÷12 = $67.20 which is an increase of $7.20 per month
        
             
        
        
        
4500 is the answer to this question.