The USDA recommends that an adult woman get 46 g of protein...

The USDA recommends that an adult woman get 46 g of protein per day. Peanuts are 25% protein. Use this
information to answer Exercises 67–68
How many grams of peanuts would an adult
woman need to satisfy a day’s protein
requirement?

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Key Concepts

Percentage Composition

This concept involves understanding that a component—such as protein—can be expressed as a percentage of the total mass of a substance. In problems like these, 25% means that in every 100 grams of the food, 25 grams are protein. This idea is fundamental in fields such as nutritional science, chemistry, and materials science, where knowing the part-to-whole relationship is essential.

Ratio and Proportional Reasoning

Ratio and proportional reasoning are used to relate different quantities and solve problems where one quantity is a fraction of another. In this context, the problem uses the ratio between the protein content of a food and its total weight to determine how much of the food is needed to provide a specific amount of protein. This concept is widely applied in everyday calculations, recipe adjustments, and scientific measurements.

Nutritional Guidelines

Nutritional guidelines provide recommended daily intakes of various nutrients for maintaining health. Understanding these guidelines is important in diet planning and nutritional science. They serve as a standard against which food composition and dietary choices can be measured to ensure that individual nutritional needs are met.

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