1. Do Now 3/30/11  Take out HW from last night. Text p. 331, #8-56 multiples of 4 Text p. 331, #8-56 multiples of 4  Copy HW in your planner. Text p. 337, #10-22 even, & #26 Text p. 337, #10-22 even, & #26  In your journal, solve the following problems. Find 20% of 90. Find 20% of 90. Find 80% of 30. Find 80% of 30. You and three friends go out to dinner and when the bill comes the total is $45, not including the tip. If you want to leave a 20% tip, how much money should you leave for the waitress. You and three friends go out to dinner and when the bill comes the total is $45, not including the tip. If you want to leave a 20% tip, how much money should you leave for the waitress. 18 $9.00 24

2. Homework Text p. 331, #8-56 multiples of 4  8) 17/50  12) 11/20  16) 80%  20) 66%  24) 1/10  28) 10%  32) 50%  36) 19  40) 13  44) 36 min  48) 17%, 9/50, 0.22, 9/25  52) 7  56) 10%

3. Objective  SWBAT use proportions to solve percent problems

4. Percent- means ‘per one hundred’ or divided by 100. How many cents are there in a dollar?

5. Section 7.2 “Percents and Proportions” You can represent “a is p percent of b” using the proportion You can represent “a is p percent of b” using the proportion In this equation, b is the whole number and a is the number that is compared to the base. will equal the percent.

6. Try It Out… What number is 15% of 88? Write a proportion where 15% is the percent and 88 is the base. 13.2 is 15% of 88 Percent proportion Substitute and then cross multiply

7. Try It Out… What number is 20% of 301? Write a proportion where 20% is the percent and 301 is the base. 60.2 is 20% of 301 Percent proportion Substitute and then cross multiply

8. Try It Out… What percent of 25 is 17? Write a proportion where 25 is the base and 17 is a part of the base. Percent proportion Substitute and then cross multiply 17 is 68% of 25

9. Try It Out… What percent of 136 is 51? Write a proportion where 136 is the base and 51 is a part of the base. Percent proportion Substitute and then cross multiply 51 is 37.5% of 136

10. Try It Out… Percent proportion Substitute and then cross multiply 20 is 12.5% of what number? Use an equation where 12.5% is the percent and 20 is a part of the base. 20 is 12.5% of 160

11. Try It Out… Percent proportion Substitute and then cross multiply 30 is 250% of what number? Use an equation where 250% is the percent and 30 is a part of the base. 30 is 250% of 12

12. Word Problem  A survey of people who suffered injuries at home found that 32% of all accidents involved falls. If 80 accidents involved falls, how many accidents were there? I’ve fallin’ and I can’t get up!! 80 is 32% of 250 Ms. Cleveland

13. Word Problem  Of the 325 teams in the NCAA Division 1 Women’s Basketball, 4% are in the Mid- American Conference (MAC). How many teams are in the MAC? 13 is 4% of 325

14. What Have We Learned… Types of Percent Problems (1) Find a percentWhat percent of 136 is 51? (2) Find a part of a baseWhat number is 15% of 88? (3) Find a base20 is 12.5% of what number?

15. Homework NJASK7 Prep Text p. 337, #10-22 even, & #26 Text p. 337, #10-22 even, & #26