Percent Proportions成比例的.ppt

Percent Proportions成比例的
文档，文
三级安全培训资料
2006年7月
1
Vocabulary…
Percent – A number that is expressed out of a total Percent Proportions成比例的
文档，文
三级安全培训资料
2006年7月
1
Vocabulary…
Percent – A number that is expressed out of a total of 100.
PERCENT
“for every…
100”
Percent Proportions
Situation:
What percent is 2 out of a total of 5?
Part
Total
What is this question asking us to find?
…The Percent
(100)
(100)
2 is 40% of 5.
When setting up your tables today think of the relationships in terms of parts and totals.
Parts
Totals
2
5
x
100
Table:
Proportion and Solution Process:
Solution:
Percent Proportions
Situation:
What number is 14% of 300?
Part
Total
What is this question asking us to find?
…The Part!
(14)
(14)
42 is 14% of 300.
When setting up your tables today think of the relationships in terms of parts and totals.
Parts
Totals
x
300
14
100
Table:
Proportion and Solution Process:
Solution:
Percent Proportions
Situation:
60 is 75% of what number?
Part
Part
What is this question asking us to find?
…The Total!
(60)
(60)
60 is 75% of 80.
When setting up your tables today think of the relationships in terms of parts and totals.
Parts
Totals
60
x
75
100
Table:
Proportion and Solution Process:
Solution:
Group Practice
As you work today look for clues:
“of