## anonymous one year ago A computer is purhcased for 980 pounds.Its value will decrease by 4% per year.How much will it be worth in 2 years time.

1. anonymous

Can you tell me its value at the end of 1 year?

2. anonymous

thats what i am struggling on @Mashy

3. anonymous

@Michele_Laino

4. Michele_Laino

after the first year the value of the computer is: $\Large 980 - \left( {\frac{4}{{100}} \cdot 980} \right) =940.8$ and after the second year the value of the computer is: $\Large 940.8 - \left( {\frac{4}{{100}} \cdot 940.8} \right) = ...?$

5. anonymous

the second year is 37.632 i think , I did 4/100 multiplied by 940.80

6. anonymous

@Michele_Laino

7. anonymous

am I also meant to subtract somewhere @Michele_Laino

8. Michele_Laino

now, you have to do this subtraction: $\Large 970.8 - 37.63 = ...?$

9. Michele_Laino

oops.. $\Large 940.8 - 37.63 = ...?$

10. anonymous

903.17

11. Michele_Laino

yes!

12. anonymous

13. Michele_Laino

yes!

14. anonymous

how did you get 4/100 multiplied by 980 as 940.8 @Michele_Laino

15. anonymous

i got 39.2 @Michele_Laino

16. Michele_Laino

since we have to do this subtraction: $\Large 980 - \left( {\frac{4}{{100}} \cdot 980} \right) = 980 - 39.2 = 940.8$

17. anonymous

why do we have to do a subtraction ?

18. anonymous

@Michele_Laino

19. Michele_Laino

because the value of the computer is decreasing from its original value

20. anonymous

why did we have to do 4 percent of 940.8 as well as 4 percent of 980 @Michele_Laino

21. anonymous

thanks for the reply for my first query

22. Michele_Laino

since at the end of one year, the value of the computer is decreased by 4% from its starting value. Now the starting value at the first year is $980.00, whereas the starting value at the beginning of the second year is$940.80

23. Michele_Laino

:)

24. anonymous

thanks

25. Michele_Laino

:)