The correct answer is B) -8.9%
The rate of change for any problem is always determined using the following equation.
[tex] \frac{NEW - OLD}{OLD} * 100 [/tex]
In this case, the old value is 3.15 and the new value is 2.87. SO we use these in the equation to get the answer.
[tex] \frac{NEW - OLD}{OLD} * 100 [/tex]
[tex] \frac{2.87 - 3.15}{3.15} * 100 [/tex]
[tex] \frac{-.28}{3.15} * 100 [/tex]
-.088889 * 100
-8.9%
