Applying Ratios and Percents

What percent is 42 of 558?

• 5.16%
• 7.53%
• 92.47%
• 234.36%

Mrs. Ciampa had 27 students in her class last year and this year she had 30 students in her math class. What is the percent of change?

• 24%
• 20%
• 11%
• 50%

What is 5% written as a decimal?

• 0.05
• 0.5
• 5
• 50

A car travels 50 miles in 40 minutes.
How many miles does the car travel in 20 minutes?

• 25 miles
• 60 miles
• 1.25 miles
• 70 miles

Alycia earned $20.40 in 3 hours. What is her unit rate in dollars per hour?

• $7 per hour
• $6 per hour
• $6.80 per hour
• $17.40 per hour

Find the percent of change if the original cost was $5 and the new cost is $1. 

• Increase $4
• Decrease $4
• Decrease 80%
• Decrease 400%

Last week, you finished level 2 of a video game in 32 minutes. Today, you finished level 2 in 28 minutes. What is your percent of change?

• Increase 12.5%
• Decrease 12.5%
• Increase 4%
• Decrease 4%

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

12% of 85 is what?

• 7.08

• 10.2

• 102.0

• 708.3

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90