# Misuses of Percentages (High-school Quantitative Reasoning)

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Lesson 7– Common Misuses of Percentages (high-school Quantitative Reasoning)

In this No Prep Math lesson, high-school students will learn the difference between percentages and percentage points, describe change using percentage points, and investigate common misuses of percentages. Notes and examples, a homework assignment, and answer keys are included.

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This is lesson 7 of my unit “Understanding Numbers” – the first unit of my high-school Quantitative Reasoning course. In this No Prep Math unit, high school students will review basic mathematical skills and apply those skills to more challenging real-world problems in the context of economic and social issues. Real-world contexts include population, population density, National Debt and Deficit, GDP, inflation and the CPI, misleading uses of percentages, and more.

Each lesson is intended to take one to three 45-minute class periods for notes and another class period for any optional activities. Five optional activities, two quizzes, a chapter review, a chapter test, and answer keys for the notes, assignments, and assessments are included in the full unit.

Chapter 1 Understanding Numbers (13 – 16 days)
1. Estimation
2. Big & Small Numbers
3. Applications of Ratios – The Federal Budget
Quiz
4. Applications of Proportions – The CPI
5. Applications of Percentages (basic percentages)
6. Describing Change (percent increase and decrease, percent more than/less than)
Quiz
7. Common Misuses of Percentages

Chapter Review
Chapter Test

Teaching Notes and Answer Keys

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This is the first unit of the first semester of my high-school Quantitative Reasoning – Math in Context course.

Total Pages
10 pages
Answer Key
Included
Teaching Duration
45 minutes
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