Answer
1.7%
Step-by-step explanation
Percentage decrease is found as follows:
[tex]\text{ \% Decrease}=(-100)\times\frac{final\text{ - initial}}{initial}[/tex]In this case, the final value is $2.82 and the initial value is $2.87. Substituting these values into the formula, we get:
[tex]\begin{gathered} \text{ \% decrease}=(-100)\times\frac{2.82-2.87}{2.87} \\ \operatorname{\%}\text{ decrease }=(-100)\times\frac{-0.05}{2.87} \\ \operatorname{\%}\text{ decrease }=1.7\text{ \%} \end{gathered}[/tex]