Back To The Future.

This Project Also Known As Back To The Future is about basically just 20 years ago and 20 years into the future. For example : An envelope cost 30 cents 20 years ago which is 1989, now a days an envelope cost about 60 cents, and in order to find out how much an envelope is going to cost in 2029, you have to do a percent change. I had fun doing this project but it was kinda difficult because of the prediction thing which is 20 years into the future. But other than that it was okay i guess. if i were to do this project again i would do nothing different. this is the way i was taught so i guess its the easiest way to do it.