Question 1033103
the percent increase is the (new price minus the old price) divided by the old price.


(480 - 400) / 400 = 80 / 400 = .2 * 100 = 20%.


since it's 480 this year, then 480 + .10 * 480 = 480 + 48 = 528.


it's the same deal (new price minus old price) divided by old price.


the old price is now 480.


the new price is 528.


the percent increase is (528 - 480) / 480 = .1 * 100 = 10%.


you can also use the same formula to determine the percent increase.


(x - 480) / 480 = .10


simplify to get x/480 - 480/480 = .10


simplify further to get x/480 - 1 = .10


add 1 to both sides of the equation to get x/480 = 1.10


multiply both sides by 480 to get x = 1.10 * 480 = 528.


the solutions to your problem are:


selection C.


shirley will have to pay 528 next year to rent an apartment for a weekend.