Lesson 7-5 Pages 312-315
Fractions, Decimals, and
Percents
What you will learn!
How to write percents as fractions, and vice versa.
(Introduced in Chapter 5)
What you really need to know!
In lesson 5-5, you wrote percents like 32% as fractions by writing fractions with denominators of 100 and then simplifying. You can use the same method to write percents like 16.8% and 8 1/3 % as fractions.
What you really need to know!
1.Divide by 100 to remove a % sign.
2.Multiply by 100 to attach a % sign.
Example 1:
In a recent poll, 41.8% of the people surveyed said they gained nutrition knowledge from family and friends. What fraction is this? Write in simplest form.
1008.41 418.0
1000
418
500
209
%10
841
1005
441
500
209
%5
441
Example 2:
Write 12 ½ % as a fraction in simplest form.
10021
12100
2
112
100
1
2
25
8
14
1
2
1
Example 3:
In one shipment of fruit to a grocery store, 5 out of 8 bananas were still green. Find this amount as a percent.
1008
5x
2
162n %
2
162
85 625.0
%5.621000.625
Example 4:
Write 5/12 as a percent. Round to the nearest hundredth.
125 416.0
%67.411000.416
Example 5:
Write 9/20 as a percent.
10020
9 %45
209 45.0
%4545 0
Example 5:
Write 3/7 as a percent. Round to the nearest hundredth.
4285714 0
73 4285714.0
%86.42
Page 314
Guided Practice
#’s 4-12
Pages 312-314 with someone at home and study
examples!
Read:
Homework: Page 314-315
#’s 13-39
#’s 41-51
Lesson Check 7-5
Page
581
Lesson 7-5
Lesson Check 7-5