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Chapter 4: Body Weight and Composition | Math Practice

Changes in Portion Sizes and Effect on Caloric Content
Food or Beverage	1980s (calories)	Today (calories)
turkey sandwich	320 calories	820 calories
French fries	210 calories	610 calories
bagel	140 calories	350 calories
slice of pizza	500 calories	850 calories
soda	85 calories	250 calories

What was the percentage change in calories for a soda from the 1980s to today?
Suppose you decide to have a turkey sandwich, French fries, and a soda for lunch. If your daily food plan allows for 2,200 total calories each day, what percentage of your total day’s calories does this meal represent?
Suppose that two men—one living in 1980 and one living today—each eat one bagel every morning for breakfast. Assuming that their diet and physical activity are the same otherwise, how many more pounds would the man living today gain in a year’s time than the man living in 1980? (Hint: There are 3,500 calories in a pound.)
What was the percentage change in calories for a slice of pizza from the 1980s to today?

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