Day 9 percent problems
- 1. AIM: Percent Problems Do Now 1
- 2. UPCOMING EXAMS 1.) Algebra Placement Exam Tuesday 2/2/10 and Wednesday 2/3/10 2.) District Midterm Wednesday 2/10/10 2
- 3. Homework: 1.) Page 23 #12-14 all 3
- 4. Anticipatory Set NEWSPAPER HEADLINE: About 61% of eligible American voters voted in the 2004 Presidential Election. 1.) How do you determine who the whole group discussed in the headline? 2.) If about 200 million Americans were eligible to vote in 2004, estimate the size of the part of the whole group? 4
- 5. Anticipatory Set NEWSPAPER HEADLINE: About 61% of eligible American voters voted in the 2004 Presidential Election. Proportion: Percent = Part 100 Whole 3.) If about 200 million Americans were eligible to vote in 2004, how many voted? Use the proportion above. 5
- 6. Think-Pair-Share Activity: Use the proportion from the Anticipatory Set to solve the following percent problems. A.) What is 90 % of 180 ? B.) 50 is 40 % of what number? 90 x 40 50 100 180 x 100 x 100 6
- 7. C.) 18 is what percent of 60 ? D.) 11 is 4 % of what number? x 18 4 11 60 x 100 100 x 100 7
- 8. E.) 28 is what percent of 210 ? F.) 22% of 105 is what number? 28 22 x x 100 210 100 105 x 100 8
- 9. G.) The student population at King Middle School is 52 % female. The total student population is 1225 students. How many boys go to King Middle School? x 1225 100 9
- 10. H.) In a survey, 46 people, which was 20 % of those surveyed, chose red as their favorite color. How many people were surveyed? 20 46 100 x 10
- 11. I.) Kylie works part-time at a greenhouse. She spends 7 hours a week watering plants and 9 hours a week transplanting seedlings. She also spends 4 hours a week filing invoices. What percent of her time is spent watering plants? x 100 11
- 12. BEFORE YOU LEAVE: Error Analysis: Find the mistake in the following problem, explain the mistake, and correct it. To find 5% of 26, the proportion x = 5 would be used. 100 26 12
- 13. Mr. Tjersland's Math 7 Homework: 1.) Pages 314-315 #5-9 all 2.) Pages 318-319 #10-15 all, 22, 23 13
- 14. AIM: Percent Problems Percent = Part 100 Whole A.) What is 90 % of 180 ? x 100 14
- 15. AIM: Percent Problems Percent = Part 100 Whole B.) 50 is 40 % of what number? x 100 15
- 16. AIM: Percent Problems Percent = Part 100 Whole C.) 18 is what percent of 60 ? x 100 16