6th Grade Math Textbook, Fundamentals

Write as a percent by using a proportion.



3 n 100 Cross multiply.

 Divide both sides by 3.

n33.3

So 33.3% or 33 %.

n

100

1

3

part

whole

1

3

1

3

100

3

3 n

3

1

3

Lesson 7-2 for exercise sets. &KDSWHU 

3UDFWLFH   $FWLYLWLHV

Method 1 Write as a Decimal

• Divide the numerator by the denominator.


• Write the decimal as a percent.
  Move the decimal point twoplaces
  to the right.


• Write the percent symbol.

3 ÷ 80.375 0.375

37.5% or 37 %^12

3

8

1

You can rename a fraction as a percent.

Rename as a percent.^38

To compare fractions, decimals, and percents, first rename them to be in like form.

Compare: 90%  and 90%  , so 90%

Compare: 40% 37 % and 37 % 40%, so 40%

Compare: 25%? 0.04 0.16 0.25 25%, so 0.040.1625%

?

?

0.04

0.16

25

100

90

100

90

100

9

10

9

10

9

10

3

8

1

2

1

2

3

8

3

8

Write each fraction or decimal as a percent.

1. 2.0.38 3. 4.0.925

Write each percent as a decimal and as a

fraction in simplest form.

5.70% 6.35.5% 7.68.67% 8.18 %^34

5

8

4

10

Compare. Write , , or .

9. 40% 10. 60% 11. 35% 12. 20% 13. 25%

14.Discuss and Write Explain how you would order 10.2%, 0.1, and from least to greatest.

0.05

0.25

0.03

0.12

4

10

?^2???

5

(^5)?
8
1
5
Method 2 Use a Proportion

• Write x: 100 as one ratio
  and the fraction as the other.


• Solve the proportion.


• Write the percent symbol.



8 x 300 Cross multiply.

 Divide both sides by 8.

x37.5 or 37 37.5% or 37 %

3

8

x

100

part

whole

1

2

3

8

1

2

300

8

8 x

8

Write as a percent by writing it as a decimal.

7 ÷ 8

0.875 0.875

87.5% or 87 %

To multiply by 100,

move the decimal point

2 places to the right.

1

2

7

8 Divide the numerator bythe denominator.

7

(^28)