Answer:
The percent change in price is 400%
Explanation:
Given, the ticket was $4.00 in 1999
And $ 20.00 in 2009
Let, price for 1999 be P1 = $4
Price for 2009 be P2 = $20
Percent change in price is calculated by the formula,
[tex]\frac{p 2-p 1}{p 1} * 100 \%[/tex]
Substituting the values in the formula,
[tex]\% \text { change }=\frac{20-4}{4} * 100[/tex]
% change = 16/4 * 100 = 400%
Therefore, the percent change in price is 400%
