[tex] percent ~change = \dfrac{new~number - old~number}{old~number} \times 100 [/tex]
Here, the new number is 4.5. The old number is 6.
[tex] percent ~change = \dfrac{4.5 - 6}{6} \times 100 [/tex]
[tex] percent ~change = \dfrac{-1.5}{6} \times 100 [/tex]
[tex] percent ~change = -0.25 \times 100 [/tex]
[tex] percent ~change = -25 [/tex]
Since the percent change is negative, it is a percent decrease.
Answer: The percent decrease is 25%.
