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Warm-up Problems
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 4-5)
Write the repeating decimal 1.22222 using bar notation.
A. 1.2
B. 1.2
C. 0.12
D. 1.2
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 4-5)
Write the repeating decimal 0.15151515 using bar notation.
A. 15.0
B. 1.5
C. 0.15
D. 0.15
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 4-5)
Use bar notation if the
decimal is a repeating decimal.
A. 1.2
B. 1.4
C. 2.4
D. 2.6
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 4-5)
Use bar notation if the
decimal is a repeating decimal.
A. 0.6
B. 0.652
C. 0.625
D. 0.571
Main Idea and Vocabulary
Key Concept: Percent
Example 1:Write Ratios as Percents
Example 2:Write Ratios as Percents
Example 3:Write a Fraction as a Percent
Example 4:Write a Fraction as a Percent
Example 5:Write a Percent as a Fraction
• Ratio-comparison of 2 quantities by division.
• Percent- a ratio comparing a number to 100.
• Write fractions as percents and percents as fractions (2.1.8A) (M7.A.1.1).
Write Ratios as Percents
Write the ratio as a percent.Diana scored 63 goals out of 100 attempts.
Answer: Diana scored on 63% of her attempts.
1. A
2. B
3. C
4. D0% 0%0%0%
A. 33%
B. 34%
C. 66%
D. 78%
Write the ratio as a percent. Alicia sold 34 of the 100 cookies at the bake sale.
Write Ratios as Percents
Write the ratio as a percent. In a survey, 31.9 out of 100 people preferred crunchy peanut butter.
Answer: So, 31.9% of the people surveyed preferred crunchy peanut butter.
1. A
2. B
3. C
4. D0% 0%0%0%
A. 0.734%
B. 7.34%
C. 73.4%
D. 86.2%
Write the ratio as a percent. 73.4 out of 100 people preferred the chicken instead of the roast beef.
=
Write a Fraction as a Percent
First, find an equivalent fraction with a denominator of 100. Then write the fraction as a percent.
Answer: .
1. A
2. B
3. C
4. D0% 0%0%0%
A. 1.8%
B. 11%
C. 20%
D. 55%
FISHING William caught and released 20 trout on his fishing trip. Twelve of them were rainbow trout. What percent of the trout he caught were rainbow trout?
Answer: So, 60% of the trout were rainbow trout.
Write an equivalent fraction with a denominator of 100.
= 60%
1. A
2. B
3. C
4. D0% 0%0%0%
A. 18%
B. 36%
C. 72%
D. 88%
READING Mitchell read 18 out of 25 chapters of a book during his winter vacation. What percent of the chapters did he read?
Write 22% as a fraction in simplest form.
Answer:
Write a Percent as a Fraction
Definition of percent
Simplify.
1. A
2. B
3. C
4. D0% 0%0%0%
Write 84% as a fraction in simplest form.
A.
B.
C.
D.
GUIDED PRACTICE
Write each ratio as a percent.
1. 57:100 insects are spiders
2. $29.20 per $100
Write each fraction as a percent.
3. ¼ 4. 6/10 5. 17/20
6. Tansy used 2/5 of the memory available on her flash drive. What percent of the memory did she use?
Write each percent as a fraction in simplest form.
7. 90% 8. 75% 9. 22%
57%
29.2%
25% 60% 85%
40%
10
9
100
90
4
3
100
75
50
11
100
22
End of the Lesson
Five-Minute Check (over Lesson 4–5)
Image Bank
Math Tools
Percents
Prime Factorization
