Lesson 12
Solving Problems about Percent Increase or Decrease
Lesson Narrative
This lesson is an opportunity for students to revisit percentages of and percentage change to solve word problems. Minimal scaffolding is provided, so students will need to make sense of the problems and perhaps attempt different solution pathways (MP1). Now, they can choose to use their deeper understanding of tape diagrams and writing and solving equations (MP5).
Learning Goals
Teacher Facing
- Solve word problems leading to equations of the form $px+q=r$ or $p(x+q)=r$
Student Facing
Let’s use tape diagrams, equations, and reasoning to solve problems with negatives and percents.
Required Materials
Required Preparation
Decide if students will conduct group presentations or a gallery walk for the last activity. If so, prepare tools for creating a visual display and around 3 sticky notes per student. If not, these materials are not necessary.
Learning Targets
Student Facing
- I can solve story problems about percent increase or decrease by drawing and reasoning about a tape diagram or by writing and solving an equation.
CCSS Standards
Addressing
Print Formatted Materials
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| Cumulative Practice Problem Set | docx | |
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| Teacher Presentation Materials | docx |