Five-Minute Check (over Chapter 6)

Then/Now

New Vocabulary

Key Concept: Percent

Example 1: Percents as Fractions

Example 2: Less Than 1% or Greater Than 100%

Example 3: Fractions as Percents

Example 4: Real World Example: Fractions as Percents

Example 5: Real-World Example: Rounding Percents

Over Chapter 6

Express the ratio 18 out of 24 students as a fraction in simplest form.

A.

B.

C.

D.

Over Chapter 6

Express the ratio 8 baskets out of 14 tries as a fraction in simplest form.

A.

B.

C.

D.

Over Chapter 6

A. 10.5

B. 13

C. 18

D. 21

Over Chapter 6

A. 45

B. 37

C. 35

D. 23

Over Chapter 6

A. elementary; 19.8 students/classroom

B. elementary;23.4 students/classroom

C. middle; 22 students/classroom

D. middle; 24 students/classroom

The elementary school has 22 classrooms for 435 students. The middle school has 37 classrooms for 814 students. Which school has the least number of students per classroom?

You have already converted fractions and decimals. (Lesson 3–1)

• Express percents as fractions.

• Express fractions as percents.

• percent

Percents as Fractions

A. Write 40% as a fraction in simplest form.

Answer:

Definition of percent

Simplify

Percents as Fractions

Answer:

B.

Definition of percent

Simplify.

A. Write 35% as a fraction in simplest form.

A.

B.

C.

D.

B. Write % as a fraction in simplest form.

A.

B.

C.

D.

Less Than 1% or Greater Than 100%

A. Write 0.3% as a fraction in simplest form.

Multiply by to eliminate

the decimal in the numerator.

Answer:

Less Than 1% or Greater Than 100%

B. Write 104% as a fraction in simplest form.

Answer:

A. Write 0.8% as a fraction in simplest form.

A.

B.

C.

D.

B. Write 160% as a fraction in simplest form.

A.

B.

C.

D.

Fractions as Percents

Answer: 95%

or 95%

A. Write as a percent. ___1920

Write an equivalent fraction with a denominator of 100. Then write the fraction as a percent.

Fractions as Percents

Answer: 160%

B.

A. 68%

B. 4.25%

C. 0.68%

D. 85%

A.

A.

B.

C.

D.

B.

Fractions as Percents

GAMES During the soccer season, the Delta Cougars won 12 of their 16 games. Find the Cougars wins as a percent.

Cross products

Multiply.

Divide each side by 16.

Simplify.

Answer: The Cougars won 75% of their games.

Fractions as Percents

A. 75%

B. 80%

C. 85%

D. 90%

Amy got 17 questions correct out of 20 on a test. What percent did she get right?

Rounding Percents

CLUBS After a survey, Deion discovered that 8 out of 14 eighth graders at his school participate in a club activity. Find the percent of eighth graders that participate in a club. Round to the nearest hundredth.

Cross products

Multiply.

Estimate ,

Rounding Percents

Divide each side by 14.

Simplify.

Answer: So, about 57.14% of eighth graders participatein a club activity.

Check for Reasonableness

57.14% is close to the estimate of 50%.

A. 28.75%

B. 31.72%

C. 34.78%

D. 38.49%

HEIGHT In Eliza’s math class, 8 out of 23 students are taller than Eliza. To the nearest hundredth, what percent of the students are taller than Eliza?