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Introduction to Percents

Introduction to Percents. What percent are red???. What is Percent?. Percent comes from the Latin per centum , or “per hundred.” A percent is a ratio of a number compared to 100. What is Percent?. A number such as 32 % can be written as “32 per hundred” or the ratio 32 .

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Introduction to Percents

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  1. Introduction to Percents

  2. What percent are red???

  3. What is Percent? Percent comes from the Latin per centum, or “per hundred.” A percent is a ratio of a number compared to 100.

  4. What is Percent? A number such as 32% can be written as “32 per hundred” or the ratio 32 . 100

  5. What is Percent? A percent shows parts of a whole, the same as a fraction is used to represent part of a whole.

  6. What is Percent? If you had a pizza that was cut into 100 pieces, 25% of the pizza would be 25 pieces!

  7. What is Percent? The blue square is 1 Whole Square. If divided into 100equal pieces, we say 100% of the square is shaded blue. So 100%and1 Whole are the same thing.

  8. What is Percent? What percent is shaded here? How do you know?

  9. What is Percent? How about here? What percent is red?

  10. Sloths may seem lazy, but their extremely slow movement helps make them almost invisible to predators. Sloths sleep an average of 12 hours per day. What percent of the day do they sleep?

  11. Here’s another way to think about it …12 sleeping hrs 24 total hrs= 1 = 50 2 100Sloths sleep about 50% of the day.

  12. There are 14 girls in Mrs. Borcherding’s Period 3 math class. There are 25 students in the class in total.What percent of the students are girls?

  13. In a recent election, 72 of the 150 sixth graders voted in their class election. What percent of the sixth graders voted?

  14. Let’s try another type of problem …

  15. Let’s try another type of problem … What is 40% of 80?

  16. What is 15% of 20?

  17. Two hundred students attended the school dance. Sixty percent of the students were 6th graders. How many students at the dance were 6th graders?

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