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# Estimating with Percents

Lesson 4 of 18

## Objective: SWBAT estimate the percent of a number

*40 minutes*

#### Launch

*5 min*

**POD**

As students enter the room, they will have a seat, take out their Problem of the Day (POD) sheet and begin to work on the question on the SMARTboard. The POD allows students to use **MP 3** continually based on the discussions we have about the problem each day.

The POD focuses student thinking on converting percents, fractions, and decimals into other forms. As we begin to estimate percents, I don’t want students to get caught unable to estimate because the conversion is a problem for them.

How do you change these percents to fractions and decimals: 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%.

What are the decimal equivalents?

How can you use 10% to find the fraction and decimal equivalents for the list of percents.

Sometimes an exact answer is not needed when using percents. Name a situation when an exact answer may not be necessary.

#### Resources

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#### Explore

*30 min*

To explore estimates we will do examples together that students can add to their notes. We will work through the examples as a whole class so that students can see how the problems are being solved and possibly see some alternate ways to solve the problem. After we work through the problems using estimation, we can go back through them finding exact answers. My goal is to have them see the effectiveness of a reasonable estimate along with how close the estimate is to the exact answer. We can then discuss the relevance of using one form over the other.

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#### Landing

*5 min*

To end class, I want the exit ticket to help students make the connection between the last two activities we have done in class. The question will serve as a formative assessment to determine who understands the relationship between estimating percents and finding percents of numbers. Do they recognize the similarities of each process?

**EXIT TICKET**

How could you round 62%?

What is 60% written as a fraction?

How could you use this to estimate 62% of 500?

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##### Similar Lessons

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- UNIT 1: Welcome to 7th Grade!
- UNIT 2: Number System
- UNIT 3: Geometric Measurement
- UNIT 4: Integers
- UNIT 5: Simplifying Expressions
- UNIT 6: Proportional Relationships
- UNIT 7: Percent Relationships
- UNIT 8: Equations and Inequalities
- UNIT 9: 2-D Measurements
- UNIT 10: 3-D Measurements
- UNIT 11: Angles
- UNIT 12: Probability

- LESSON 1: Percents Pre Assessment
- LESSON 2: Percent Inquiry Lab
- LESSON 3: Percent of a Number
- LESSON 4: Estimating with Percents
- LESSON 5: Percents Greater Than 100
- LESSON 6: Write It Wednesday Percents
- LESSON 7: Inquiry Lab II
- LESSON 8: Percent of Change
- LESSON 9: Percent of Change Partners
- LESSON 10: Increasing and Decreasing Percents Assessment
- LESSON 11: Visually Mapping Percents
- LESSON 12: Fractions Too?
- LESSON 13: Write It Wednesday Set Up
- LESSON 14: Write It Wednesday Percent Total Cost
- LESSON 15: Tips and Markups
- LESSON 16: Discounts
- LESSON 17: Percents Review
- LESSON 18: Percents Post Assessment