Algebra 1 2-10 Complete Lesson: Change Expressed as a Percent

Problem 2 Got It? In one year, the toll for passenger cars to use a tunnel rose from $3 to $3.50. What is the percent increase?

Vocabulary: Determine whether the situation involves a percent increase or a percent decrease.

A hat that originally costs $12 sold for $9.50.

Vocabulary: Determine whether the situation involves a percent increase or a percent decrease.

You buy a DVD for $10 and sell it for $8.

Vocabulary: Determine whether the situation involves a percent increase or a percent decrease.

A store buys glasses wholesale for $2 per class. The store sells them for $4.50

Reasoning: What is the greatest possible error of a measurement taken to the nearest tenth of a meter? Hint: Consider how many centimeters are in one tenth of a meter.

Writing: How is calculating percent increase different from calculating percent decrease?

Review Lesson 2-9: What percent of 12 is 9?

Enter your response in the following format: 4%

Review Lesson 2-9: What is 35% of 185?

Enter only a number. Use decimal form, if necessary.

Review Lesson 1-3: Graph the numbers on the same number line.

Review Lesson 1-3: Drag the numbers to sort them from least to greatest.

The top should represent the least, the bottom the greatest.

Vocabulary Review: Match each coin with the percent of a dollar it represents.

Describe the change as an increase or decrease. 72 to 84

Describe the change as an increase or decrease. 25 to 16

Describe the change as an increase or decrease. $.99 to $1.02

Notes: Take a clear picture or screenshot of your Cornell notes for this lesson. Upload it to the canvas. Zoom and pan as needed.

For a refresher on the Cornell note-taking system, click here.

Reflection: Math Success