Respuesta :

[tex]\begin{gathered} \text{Percentage decrease =} \\ \frac{\text{initial value - new value}}{\text{initial value}}\times100 \end{gathered}[/tex]

Initial value= $600

new value = $ 480

[tex]\begin{gathered} =\frac{600-480}{480}\times100 \\ =\text{ }\frac{120}{480}\times100 \\ =\text{ 25\%} \end{gathered}[/tex]

25% decrease is the answer