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Understanding Percents: Finding the Percentage of a Number

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This guide explores the concept of finding the percent of a number through practical examples. One method involves using proportions to determine how many individuals in a community speak a specific language based on percentage data. Another example illustrates calculating the recommended daily value of potassium from nutrition facts. By applying these strategies, learners can enhance their understanding of percentages and their real-life applications. Whether you are tackling community statistics or nutritional data, mastering these methods equips you with essential skills.

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Understanding Percents: Finding the Percentage of a Number

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  1. 7-1/7-2 Notes APPLYING PERCENTS

  2. Main Idea/Vocabulary • Find the percent of a number.

  3. EXAMPLE 1

  4. EXAMPLE 1

  5. Show both methods:

  6. EXAMPLE 2

  7. LANGUAGESThe graph below shows that 30% of the people in a community speak Spanish as their first language. If a community has 800 people, how many people can be expected to speak Spanish as their first language?

  8. PROPORTION METHOD

  9. Example 4 BREAKFASTSally read the nutrition facts on a box of her favorite cereal. Each cup of the cereal provides 7% of the recommended daily value of potassium. If a cup of cereal contains 260 milligrams of potassium, what is the recommended daily value of potassium? You know that 260 milligrams is 7% of the recommended daily value. So, the problem asks 260 is 7% of what number? Thus, you need to find the whole.

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