You want to find 15% of $500; to do this, multiply $500 by 0.15 (75) and you got your answer $75
To find this you would do 800 + 15x where x is the amount of years.
For 9 years it would be 800 + 15(9) which is 800 + 135.
At the end of 9 years, the apartment's rent would be $935. I hope that's utilities included because... yikes...
Because youre adding parts of the fraction and not changing the amount of parts the fraction is divided in to.
