5-minute check

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

Write the ratio 36 to 21 as a fraction in simplest form.

A.

B.

C.

D.

(over Lesson 6-1)

1. A

2. B

3. C

4. D

A B C D

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Write the ratio 16 to 64 as a fraction in simplest form.

A. 4

B. 2

C.

D.

(over Lesson 6-1)

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

Write the ratio 22 meters to 180 meters as a fraction in simplest form.

A.

B.

C.

D.

(over Lesson 6-1)

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

Determine and explain whether the ratios 4:6 and 52:78 are equivalent.

A. Yes; 4:6 = and 52:78 =

B. Yes; 4:6 = and 52:78 =

C. No; 4:6 = and 52:78 =

D. No; 4:6 = and 52:78 =

(over Lesson 6-1)

1. A

2. B

3. C

4. D

0% 0%0%0%

Determine and explain whether the ratios 8:17 and 32:64 are equivalent.

A. Yes; 8:32 = and 17:64 =

B. Yes; 8:32 = and 17:64 =

C. No; 8:17 = and 32:64 =

D. No; 8:17 = and 32:64 =

(over Lesson 6-1)

Main Idea and Vocabulary

Key Concept: Ratios

Example 3:Real-World Example

• Ratio – a comparison of two quantities by division.

• equivalent ratios – Ratios that express same relationship between 2 quantities

• Write ratios as fractions in simplest form and determine whether two ratios are equivalent (2.1.8D) (M7.A.2.2).

POOLS It is recommended that no more than one person be allowed into the shallow end of an outdoor public pool for every 15 square feet of surface area. If a local pool’s shallow end has a surface area of 1,800 square feet, are the lifeguards correct to allow 120 people into that part of the pool?

Recommended ratio

Actual ratio

Answer: Since the ratios simplify to the same fraction, the lifeguards are correct to allow 120 people into the shallow end of the pool.

1. A

2. B

A. yes

B. no

SCHOOL A district claims that they have 1 teacher for every 15 students. If they actually have 2,700 students and 135 teachers, is their claim correct?

0%0%

1. A

2. B

A. yes

B. no

SHOPPING A grocery store has a brand-name cereal on sale at 2 boxes for $5. You buy 6 boxes and are charged $20. Based on the price ratio indicated, were you charged the correct amount?

0%0%

End of the Lesson

Five-Minute Check (over Chapter 5)

Image Bank

Math Tools

Scale Drawings

Using Proportions