Course 2, Lesson 2-3 Estimate. 1. 48% of 30 2. 8.5% of 268 3. 112% of 49 4. 83% of 79 5. Twenty-two...
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Transcript of Course 2, Lesson 2-3 Estimate. 1. 48% of 30 2. 8.5% of 268 3. 112% of 49 4. 83% of 79 5. Twenty-two...
Course 2, Lesson 2-3
Estimate.
1. 48% of 30
2. 8.5% of 268
3. 112% of 49
4. 83% of 79
5. Twenty-two percent of the seventh-grade class at Santa Ana
Middle School has blue eyes. If the seventh-grade class has
139 students, about how many have blue eyes?
6. Write an estimate of 128% of 179?
Course 2, Lesson 2-3
ANSWERS
1. 15
2. 28
3. 55
4. 64
5. 28
6. 225
HOW can percent help you understand situations involving money?
Ratios and Proportional Relationships
Course 2, Lesson 2-3
Ratios and Proportional Relationships
Course 2, Lesson 2-3 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
7.RP.3Use proportional relationships to solve multistep ratio and percent problems.
Mathematical Practices
1 Make sense of problems and persevere in solving them.
3 Construct viable arguments and critique the reasoning of others.
4 Model with mathematics.
To use the percent proportion to find:• the Percent• the Part, or• the Whole
Ratios and Proportional Relationships
Course 2, Lesson 2-3
Percent Proportion
Ratios and Proportional Relationships
Course 2, Lesson 2-3
Percent Proportion
Ratios and Proportional Relationships
Course 2, Lesson 2-3
Find the percent
Find the part
Find the whole
whol=part
e 100n
percentnumber
who e=
l 100n
percent numberpart =
100n
How did what you learned today help you answer the
HOW can percent help you understand situations involving money?
Course 2, Lesson 2-3
Ratios and Proportional Relationships
How did what you learned today help you answer the
HOW can percent help you understand situations involving money?
Course 2, Lesson 2-3
Ratios and Proportional Relationships
Sample answers:• You can use the percent proportion to solve situations
involving money.
The next lesson will be about solving problems
using the percent equation. Predict what the percent equation might look like since it is based on the
percent proportion.
Ratios and Proportional Relationships
Ratios and Proportional Relationships
Course 2, Lesson 2-3