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