In order to get the increase or decrease, we need to get the difference of the two prices first. Then, pick a "reference year".
From the calculations, notice how I made the earlier years as my reference points. If the calculations produced positive results, therefore, it has increased. If it produced a negative results, from the reference year's price, it has decreased in price.
Answer: The rest of the question is the attached figure The percent change = If (+ve) increase and if (-ve) decrease Part A: What is the percent of change in the cost of a pizza? The initial price = $7.5 The final price = $9 The percent change = % Part B: What is the percent of change in the cost of a cheeseburger? The initial price = $5 The final price = $6.5 The percent change = % Part C: What is the percent of change in the cost of a serving fries? The initial price = $2 The final price = $4.5 The percent change = % Part D: What is the percent of change in the cost of a hot dog? The initial price = $2.5 The final price = $2 The percent change = % i found this online i hope if helps you