Final answer:
The percentage decrease is 7.04%.
Step-by-step explanation:
To find the percentage decrease, we need to calculate the difference between the original price and the new price, and then divide that difference by the original price. Finally, multiply the result by 100 to get the percentage.
The difference in price is $3.55 - $3.30 = $0.25.
Now, divide $0.25 by $3.55 and multiply by 100 to get the percentage decrease:
Percentage decrease = ($0.25 / $3.55) x 100 = 7.04%