📝 Practice Worksheets
🛠️ Related Tool
🔑 Key Concepts
- A double number line shows two related quantities at the same time.
- Percent means “out of 100,” so 100% represents the whole amount.
- The whole quantity and 100% should line up at the end of the number lines.
- Equal spaces on both number lines represent equivalent ratios.
- Double number lines help students see proportional relationships visually.
✏️ Worked Example
🧠 Math Vocabulary
- Double Number Line: A visual model that shows two related quantities increasing together.
- Percent: A ratio that compares a number to 100.
- Whole: The total amount, which represents 100%.
- Equivalent Ratios: Ratios that represent the same relationship.
- Proportional Relationship: A relationship where two quantities increase or decrease at the same rate.
💡 Main Idea
In this lesson, students learn how to use a double number line to find a percent of a number. The whole quantity lines up with 100%, and equal parts on both number lines show equivalent ratios. This helps students see percent as a proportional relationship instead of just a procedure.
📚 What You Should Already Know
Students should understand basic fractions, percents, equivalent ratios, and how to divide a quantity into equal parts. It also helps to know that 100% represents the whole amount.
🚀 What Comes Next
After using double number lines to find percents, students can connect this visual model to percent proportions, tape diagrams, equivalent rates out of 100, and real-world percent problems.
🧩 Embed This Video in Your LMS
Teachers can embed this YouTube video directly into Canvas, Google Classroom, Schoology, or another learning platform. Click below to show the embed code for this video.