Answer:
[tex]20\%[/tex]
Step-by-step explanation:
The question in English is
In one appliance store, a refrigerator cost $8,900 and they lowered it to $7,120. What percentage did they lower?
we know that
$8,900 ------> represent the 100%
so
by proportion
[tex]\frac{100\%}{\$8,900}=\frac{x\%}{\$7,120}\\ \\x=7,120*(100\%)/8,900\\ \\x=80\%[/tex]
therefore
the percentage is equal to
[tex]100\%-80\%=20\%[/tex]
