If you multiply 0.08 (8%) and 25,000, then you get 2,000. That's how much it depreciates per year. Multiply the 2,000 by 5 and you get 10,000. 25,000-10,000=15,000, the amount it will be worth in 5 years from now.
Hope this helps!
lol this is exactly the question I answered 20 secs ago