6th Grade Math Textbook, Fundamentals

Lesson 7-1 for exercise sets. &KDSWHU 

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Rename each ratio as a percent.

1. 2.3 : 10 3.60 to 1000 4. 5. 6.

Rename each percent as a ratio in simplest form.

7.25% 8.35% 9.60% 10.84% 11.4% 12.13.5%

13.Jeff won 6 out of the 20 games he played with his sister.

What percent of the games played did Jeff win?

14.Discuss and Write Explain why and both represent 10%.

Use models to justify your answer.

1

10

10

100

50

100

9

20

4

5

7

50

When the second term of a ratio is a factor of 100,

multiply both terms to rename the ratio as a percent.

Serena took a mathematics test that had 25 questions.

She had 18 correct answers.

What percent of Serena’s answers were correct?

part : whole %

18 : 25   72%

So 72% of Serena’s answers were correct.

72

100

18 • 4

25 • 4

18

25

number of correct answers

total number of answers

Rename as a percent.

15%

So 203 15%.

3 • 5

20 • 5

3

20

3

20

15

100

Rename as a percent.

24%

So^1250 24%.

24

100

12 • 2

50 • 2

12

50

12

(^1250)
72
100
18 • 4
25 • 4
65%
65%  10065 100 65 ^55 ^1320
1
Write each percent as a ratio in simplest form.
Think
The GCF of 65 and 100 is 5.
8%
8%  1008 100 8 ^44  252
(^2) 14.2%
14.2%  14.2 100 1000142 50071
3
Think
The GCF of 8 and 100 is 4.
Think
The GCF of 142 and 1000 is 2.

You can rename a percent as a ratio.

Think

25 • 4 100, so multiply

both terms by 4.