Answer
The percent change in the price of a bleacher seat is 150%.
It is a percent increase.
Work Step by Step
To find the percent change, we use the following formula:
percent change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100%
The original price was 8.00 dollars. The new price became 20.00 dollars. Substituting these values into the formula yields
percent change = $\frac{20.00\ -\ 8.00}{8.00}$ $\times$ 100%
percent change = $\frac{12.00}{8.00}$ $\times$ 100%
percent change = 1.5 $\times$ 100%
percent change = 150%
Because the percent change is a positive number, it is a percent increase.
