1. 1. Take out your math notebook, pencil, DEAR book. 2. Warm UP: Green Book p. 402 (9-16) 3. DEAR until we begin

2. Warm Up Answers: p.402 (9-16) 9) 10% 10) 43/100 11) 3/5 12) 76% 13) 0.32 14) 92% 15) 109/200 16) 7.5% # correct 8

3. Before we begin today, some questions for you… What does the word “percent” literally mean? What is a very common unit of measure that uses 100 as its scale? If I wanted to know how much 75% of $1.00 was, what could I think? What about 75% of $2.00? “per” – out of “cent” – 100 MONEY! There are 100 pennies in a dollar 75 “out of 100” pennies is 75¢ 75¢ + 75¢ = $1.50

4. Class set of “books” that remain IN THE CLASSROOM Please keep them NICE because they are in use for a couple weeks Personal copy of the ACE questions that you may keep and TAKE WITH YOU (and even write on if you want) Let’s begin!

5. Runners, go get your lab sheets and “books” for your group members… Make sure your notebook cover sheet looks like this: #. Date Book Brief Description 1. 12-5C&S Problem 4.1, ACE 1, 2, 15-17, 23 2. 12-6 C&S Problem 4.2, ACE 3-5, 18-19 3. 12-7 C&S Problem 4.3, ACE 6-14, 22 4. 12-12B&PIII Problem 4.1, ACE 2,3,13,14,27,28 (packet) Big Idea: Calculate tax and total cost You will need: Calculator 4.1 Lab sheet

8. Remember…(write this down!) Changing a Decimal to a Percent D  Pmove the decimal 2 to the right then add the % Ex).53 = 53%Ex).009 = 0.9% Ex) 0.7 = 70%Ex) 4 = 400% Changing a Percent to a Decimal D  Pmove the decimal 2 to the left and remove the % Ex) 68% = 0.68Ex) 2% = 0.02 Ex) 112% = 1.12Ex) 8.67% = 0.0867

9. Charlotte  7.25% Washington  6.5% Michigan  6% Colorado  2.9% Why do you think there are so many differences? Who decides what percent we pay?

10. CD  $7.50 Tax  $7.50 (.06) = $0.45 Total  $7.95 Hint: Change the percent to a decimal! Another way: You would pay $0.06 on every dollar you spend, so multiply 6 cents by 7.5 dollars to get 45 cents. Then, add them together!

11. Tax: 2 (.06) =.12Total: 2.00 +.12 = $2.12 Tax: 5 (.06) =.3Total: 2.00 +.30 = $5.30 Tax:.5 (.06) =.03Total:.50 +.03 = $.53

12. Tax: 2 (.07) =.14Total: 2.00 +.14 = $2.14 Tax: 5 (.07) =.35Total: 2.00 +.35 = $5.35 Tax:.5 (.07) =.035 Total:.50 +.035 = $.53 or $.54

13. Since Alexis had to pay $0.06 for each dollar, find how many “.06” are in 4.80 by dividing! 4.80/.06 = $80 as the original cost!

14. $0.75 /.05 = $15 was to price of the game We know he paid $.05 for every dollar he spent, so again, you divide the tax amount by $.05 to get $15!

15. Make sure your notebook cover sheet looks like this: #. Date Book Brief Description 1. 12-5C&S Problem 4.1, ACE 1, 2, 15-17, 23 2. 12-6 C&S Problem 4.2, ACE 3-5, 18-19 3. 12-7 C&S Problem 4.3, ACE 6-14, 22 4. 12-12B&PIII Problem 4.1, ACE 2,3,13,14,27,28 (packet)