1. 4 Pic 1 word
R, C, E,T, R, F, S, P, N, O, A,E
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2. Done By: Mrs. Grant-Brooks Durham Bulls Math
Percentages
Done By: Mrs. Grant-Brooks
Durham Bulls Math

3. Percents Group activity
Discuss what you know about percents. Complete questions 1 and 2 in the table.
What do you know about percent?
What do you want to learn about percent?
What have you learned about percent?

4. Warm up
What is ÷ ?

5. Percent

6. Percentage of a Number

7. Percent of a number Percent means per hundred or out of every hundred
Examples: 20% of 200 students were already assigned lockers.
20 of first of second 100
Total of 40 students were assigned lockers
20% of 200 is?
× = 40 students
Calculator (20 ÷ 100 ) × 200 = 40 students

8. Let’s estimate some percentages
100% = =1 whole
50% = = (Split the number in 2 take 1 part) % = = 1 5 (Split the number in ? take ? part)
25% = = (Split the number in ? take ? part) 10% = = (Split the number in ? take ? part)
75% = = 3 4 (Split the number in ? take ? parts) 5% = = (Split the number in ? take ? part)

9. Lets try! 50% of 600 is? 10% X 80 is? 25% of 200 is? 20% of 600 is?
Draw this table
Estimate
Calculate (Show working)
50% of 600 is?
10% X 80 is?
25% of 200 is?
20% of 600 is?
100% of 450?
80% of 3550?

10. More than a whole percentages
Lets say that the school population for this year is 150% of what is was last year. If there were 800 students enrolled last year, how may students are enrolled this year?
Now recall that 100% = =1 whole
So (100% +50%) X 800 is
=1200 students OR
150% of 800
× =1200 students
Calculator (150 ÷ 100 ) × 800 = students

11. Lets try!
What is 200% of 95?
350% of 500 is?
415% of 3160?

12. Review finding percentage

13. Finding percentage Lets calculate the percentage for your quiz scores!
Patrice got 16 questions correct of 20 questions. What percentage did she get from her test?
× 100% = 80%
Lets calculate the percentage for your quiz scores!

14. Activity
In pairs:
Write what you have learned about percentages on your sheet.
Write an example of percentage problem and solve it

15. Lets try! What percent of 29 is 3? What is 28% of 63?
If 30% of the students in a class of 50 are boys? How many boys are in the class? How many girls?