Question

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.

Answer 1

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

Answer 2

thats what i am struggling on @Mashy

Answer 3

@Michele_Laino

Answer 4

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:
\[\Large 940.8 - \left( {\frac{4}{{100}} \cdot 940.8} \right) = ...?\]

Answer 5

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

Answer 6

@Michele_Laino

Answer 7

am I also meant to subtract somewhere @Michele_Laino

Answer 8

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

Answer 9

oops..
\[\Large 940.8 - 37.63 = ...?\]

Answer 10

903.17

Answer 11

yes!

Answer 12

is that the answer?

Answer 13

yes!

Answer 14

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

Answer 15

i got 39.2 @Michele_Laino

Answer 16

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

Answer 17

why do we have to do a subtraction ?

Answer 18

@Michele_Laino

Answer 19

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

Answer 20

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

Answer 21

thanks for the reply for my first query

Answer 22

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

Answer 23

:)

Answer 24

thanks

Answer 25

:)