1. Finding Percents
EdTech 521
Asynchronous Lesson
By Cassie Koch
8th Grade Math

2. Lesson
View presentation
Quiz Star:
http://quizstar.4teachers.org/indexs.jsp
Virtual Field Trip:
http://edtech2.boisestate.edu/kochc/521/indian_education/home.html
3. Percents in the Real World
Grades
Shopping
Travel
Chemistry
Weather
Interest
Sales Tax
Tips
4. What are Percents?
A part of the whole
Example: What percent of Pizza is left?
Whole = 8 slices
Part left = 4
Ratio: Part= 4 = 1=0.5 = 50%
Whole8 2
5. Use Proportions
Set your part over whole ratio equal to p over 100.
Part=p
Whole 100
Pizza Example:
4=p
8 100
6. Solving Proportions
4=p
8100
Cross multiply:
4x 100 = 8 xp
400 = 8p
Solve for p
400 = p
8
P = 50%
7. Example:
What percent of 162 is 90?
Part = 90
Whole = 162
90=p
162 100
Cross Multiply
90 x 100 = 162 xp
900 = 162p
Solve for p
900=p
162
P= 56%
8. Your Turn
24 is what percent of 60?
9. Your Turn Cont.
Part=
24
Whole =
60
24=p
60 100
2400 = 60p
p = 40%
10. Take the Quiz
Go to Quiz Star:
http://quizstar.4teachers.org/indexs.jsp
Login: edtech521
Password: edtech521
11. Virtual Field Trip
Go to:
http://edtech2.boisestate.edu/kochc/521/indian_education/home.html
Study about the tribes in Montana.
Answer the three questions on each tribe in a Google doc
Draw the tribes reservations in the map.
12. Resources
Pizza Image:
http://ocmboces.org/clt/larmstrong/K2sites/Armstrong/Math/numsense/numsense.htm