For this case we can make the following rule of three:
$ 500 -----------------> 100%
440 $ -----------------> x
From here, we clear the value of x.
We have then:
[tex]x = (440/500) * (100)
x = 88[/tex]
Then, the decrement percentage is:
[tex]100 - 88 = 12
[/tex]
Answer:
the percent of decrease is:
12%
