1. 3.1 and 3.2 Review Using Proportions and Percent Equations WARM UP Estimate the value of each expression. 1.40% of 495 2.90% of 199.99 3.5% of 79.95 4.20% of 119.99

2. 3.1 and 3.2 Review Using Proportions and Percent Equations Review What we learned last week on how to solve percent problems A test had 20 questions. If Tracey got 75% correct, how many questions did Tracey get correct? 75% of 20 = 0.75 x 20 To calculate the % of a number, multiply the percent as a decimal by the number = 15

3. 3.1 and 3.2 Review Using Proportions and Percent Equations Review What we learned last week on how to solve percent problems Twenty-eight students in a class took an algebra test. If 21 students passed the test, what percent passed? = 0.75 To calculate the %, divide the part by the whole and change the decimal to a percent. = 75%

4. 3.1 and 3.2 Review Using Proportions and Percent Equations Review In a school, 25% of the teachers are math teachers. If there are 5 math teachers, how many teachers are there in the school? = 200 To calculate the whole, divide the part by the percent written as a decimal.

5. 3.1 and 3.2 Review Using Proportions and Percent Equations Review January 25, 2016 ISN Page 65-66 Percent Proportions

6. 3.1 and 3.2 Review Using Proportions and Percent Equations Review Use what we know about proportions Percent is a ratio that is a “part” to the “whole” of 100 A test has 20 questions. If Tracey gets 75% correct, how many questions does Tracey get correct? 100%

7. 3.1 and 3.2 Review Using Proportions and Percent Equations Review Do #4 and 5 with your group (pg 158) You have 3:16 min. Show your work in your ISN page 65

8. 3.1 and 3.2 Review Using Proportions and Percent Equations Review

9. 3.1 and 3.2 Review Using Proportions and Percent Equations Review

10. 3.1 and 3.2 Review Using Proportions and Percent Equations Do #1 and 2 with your group (pg 159) You have 3:52 min. Problem 3 Not Always?

11. 3.1 and 3.2 Review Using Proportions and Percent Equations Problem 3 Not Always? Did Katie determine the sale price of the airline ticket? What did Katie determine? What does the $46 represent? What can Katie do with her answer to determine how much she paid for the airline ticket?

12. 3.1 and 3.2 Review Using Proportions and Percent Equations Problem 3 Not Always? Why did Vicki use 80% instead of 20%? Twenty percent off is the same as 80% of something.

13. 3.1 and 3.2 Review Using Proportions and Percent Equations Problem 3 Not Always? ADD to your ISN (page 66) My flight was $229.99 but I got 20% off because I booked it online. What did I pay? 100% - 20% off = 80%, or I’m paying 80% 100x = (80)(229.99) 100x = 18399.2 x = 183.99

14. 3.1 and 3.2 Review Using Proportions and Percent Equations Do #3 a-c with your group (pg 160) You have 3:21 min. Problem 3 Not Always? Show your work in your ISN page 65

15. 3.1 and 3.2 Review Using Proportions and Percent Equations Homework: Lesson 3.2 Skills Practice handout Weekly Math #18 (Monday)