Final answer:
To find the percent decrease, subtract the new price from the original price, divide the result by the original price, and multiply by 100.
Step-by-step explanation:
To find the percent decrease, we need to calculate the amount of decrease first. The original price of the can of tuna is $3.15 and the new price is $2.99. The decrease is the difference between the original price and the new price, which is $3.15 - $2.99 = $0.16.
To find the percent decrease, we divide the amount of decrease ($0.16) by the original price ($3.15) and multiply by 100. So, the percent decrease is ($0.16/$3.15) * 100 = 5.08%.
Therefore, the percent decrease in the price of the can of tuna is 5.08%.
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