Math Example: Percents with Double Number Lines: Example 6

Topic

Ratios, Proportions, Percents

Description

This example demonstrates how to solve for an unknown value using a double number line when given a percentage. The image features two parallel number lines: one ranging from 0 to 100% and another from 0 to an unknown value x. It visually illustrates the process of determining x when 75 is 50% of x.

Double number lines are powerful tools for teaching percentages as they provide a clear visual representation of the relationship between percentages and their corresponding numerical values. This collection of examples covers various scenarios, including finding the whole when given a part and a percentage.

Presenting multiple worked-out examples is crucial for students to fully grasp the concept of percentages using double number lines. Each example builds upon the previous one, gradually increasing in complexity and addressing different types of percentage problems. This approach allows students to recognize patterns, develop problem-solving strategies, and gain confidence in applying the double number line method to various percentage calculations.

Teacher Script: "Let's look at this example where we need to find the whole when given a part and a percentage. We're told that 75 is 50% of some number. Using our double number line, we can visually represent this problem. Notice how 75 aligns with 50% on our percentage line. This helps us see that 75 is half of our unknown number. If 75 is half, what's the whole number? That's right, it's 150. This visual method helps us understand the relationship between percentages and the numbers they represent."

For a complete collection of math examples related to Percentages click on this link: Math Examples: Percents and Double Number Lines Collection.