1. Solve Percent Problems You need two different colored highlighters Not all slides used in notes

2. Percent Problems centPer Means to form a ratio written in a fraction format Means 100 So 15 percent (15%) means 15/100

3. A percent is the ratio of a number to 100. 6 100 = 6%

4. Write the percent modeled by the grids below = 25% 25 100 = 63% 63 100

5. Sloths may seem lazy, but their extremely slow movement helps to make them almost invisible to predators. Sloths sleep an average of 16.5 hours a day. To find out what percent of a 24-hour day 16.5 hours is, you can use a proportion or an equation. Proportion Method Equation Method n 100 = 16.5 24 Part Whole Part Whole What percent of 24 is 16.5? n · 24 = 100 · 16.5 24n = 1,650 n = 68.75 n · 24 = 16.5 n = 0.6875 n = 68.75% Sloths spend about 69% of the day sleeping!

6. EX 1) Set up a proportion. Multiply. Divide each side by 25 to isolate the variable. % 100 = Part Whole % 100 = Is Of 15 is 25% of what number? 25 100 = 15 n 25n = 1,500 25n 25 = 1,500 25 n = 60 15 is 25% of 60. 0 10%50% 100% 0 60 15 25% 30

7. What percent of 50 is 10? n 100 = 10 50 n · 50 = 100 · 10 50n = 1,000 50n 50 = 1,000 50 n = 20 10 is 20% of 50. Write a proportion. Set the cross products equal. Multiply. Divide each side by 50 to isolate the variable. EX 2) 0 10%50% 100% 0 50 25 5 20% 10

8. What is 40% of 20? 40 100 = 8n8n n · 40 = 100 · 8 40n = 800 40n 40 = 800 40 n = 20 8 is 40% of 20. Write a proportion. Set the cross products equal. Multiply. Divide each side by 40 to isolate the variable. EX 3) 0 10%50% 100% 0 10 40% 20 28

9. Notes start here

10. Solve Percent Problems You need two different colored highlighters Not all slides used in notes Date _____________

11. EX 1)15 is 25% of what number? 0 10%50% 100% 0 25%

12. What percent of 50 is 10?EX 2) 0 10%50% 100% 0

13. What is 40% of 20? EX 3) 0 10%50% 100% 0