Percent Proportion Change

One week, 72 people got a speeding ticket. The next week, only 36 people got a speeding ticket. What is the percent of change in the speeding tickets?

• Increase 50%

• Decrease 50%

• Increase 1%

• Decrease 1%

The population of your town increased within the past 10 years, from approximately 82,000 people to 87,000. What was the percent increase in population?

• 10%

• 5%

• 50%

• 6%

Gas prices decreased in the past month from $3.89 a gallon to $2.99 a gallon. What was the percent decrease in gas prices?

• 50%

• 23%

• 15%

At least year’s company Christmas party, only 200 people participated in the Secret Santa gift give-away. This year, 350 people participated. What was the percent increase in participants?

• 75%

• 90%

• 85%

What is percent change?

• a percentage taken off a price, or a reduction in price

• money charged on sales based on a percent of the price

• a measurement that compares an old value to a new value

• a measurement that compares an estimate to an exact value

Calculate the percent change from 50 to 75.

• 25%

• 50%

• 75%

• 100%

What is the percent change when a quantity increases from 100 to 150?

• 25%

• 50%

• 75%

• 100%

When writing a percent of change proportion, you are comparing parts to wholes.

• True

• False

The price of an airplane ticket from Lubbock, TX to Dallas, TX changed from $225 to $162. By what percentage did the cost of the ticket change. (Select the correct answer from the choices below to complete the statement.) The price of the ticket ​ ​ ​ (a)   by​ ​ (b)   .​ ​

• Increased

• 39%

• 63%

• 72%

• decreased

• 28%

Use Notes #10.

Drag and drop the correct percent of change to each box.

a

b

c

20% decrease

25% increase

33% increase

23% decrease