Yesterday, I went to the store and saw a shirt for $19.99. Today , I looked online and saw the same shirt for $16.99. What is the percent change in the price of the shirt? Is this an increase or decrease?
Show your work
$19.99 - $16.99 = $3.00
$3.00 / $19.99 = 0.15
0.15 x 100 = 15%
This is a decrease of 15%.