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Example 6.22 from Prealgebra, 6.2 Solve General Applications of Percent
Solve General Applications of Percent: example 6.22
Mitzi received some gourmet brownies as a gift. The wrapper said each brownie was calories, and had calories of fat. What percent of the total calories in each brownie comes from fat?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
What are you asked to find? the percent of the total calories from fat Choose a variable to represent it. Let percent from fat. Write a sentence that gives the information to find it. What percent of 480 is 240? Translate the sentence into an equation. Divide both sides by 480. Simplify. Convert to percent form. Check. Is this answer reasonable? Yes. 240 is half of 480, so 50% makes sense. Write a complete sentence that answers the question. Of the total calories in each brownie, 50% is fat.
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Veronica is planning to make muffins from a mix. The package says each muffin will be calories and calories will be from fat. What percent of the total calories is from fat? (Round to the nearest whole percent.)
How did it go?