Question 687051
To solve this, we first need to know how much Sue's utility bill is.  We know that her utility bill is 25% of $900.  


So, 900 x .25 = 225.  Her utility bill is $225 a month.  


If she wants to reduce the bill by 15%, to find how much she will save, you will multiply the total cost of her utility bill by 15%:


225 x .15 = 33.75


Therefore, she will save $33.75 if she reduces her utility bill by 15%.