Unit 6: Percent Increase and Decrease

Students deepen their understanding of proportional relationships and percentages, solving multi-step problems and applying percent increase and decrease in real-world contexts.

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Unit

Review the unit’s main ideas.

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Concept

Start with the core idea.

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Practice

Build fluency with more questions.

Set 1

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Set 2

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Advanced

Try more challenging problems.

Set 1

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Set 2

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What this unit covers

A Proportional Relationships with Fractions · 3 lessons

Goals

• Create algebraic expressions that represent a situation involving adding or subtracting a fraction of the initial value.
• Solve problems about proportional relationships with fractional quantities.
• Use long division to generate a decimal representation of a fraction.

Lessons

1. Revisiting Proportional Relationships
2. More than That, Less than That
3. Say It with Decimals

B Percent Increase and Decrease · 4 lessons

Goals

• Create algebraic expressions or equations that represent a situation involving percent increase or decrease.
• Use diagrams to solve problems involving percent increase or decrease.

Lessons

1. Increasing and Decreasing
2. One Hundred Percent
3. Percent Increase and Decrease with Equations
4. Part of a Percent

C Applying Percentages · 4 lessons

Goals

• Calculate measurement error, and express it as a percentage of the actual value.
• Solve problems involving tax, tip, simple interest, markup, markdown, or commission.

Lessons

1. Tax and Tip
2. Percentage Contexts
3. Solving Multi-step Percentage Problems
4. Expressing Error as a Percentage

D Let’s Put It to Work · 2 lessons

Lessons

1. Changes on the Earth (Optional)
2. Posing Percentage Problems