# Gettin' to the Hundreds

- Author:
- Arpit Kesharwani

UNIT 4 • LESSON 7ONE HUNDRED PERCENT

- Setting the Stage
- 7.1: Notice and Wonder: Double Number Line
- 7.2: Double Number Lines
- 7.3: Representing More Juice
- Are You Ready For More?
- 7.4: Protecting the Green Sea Turtle
- Summary

- Understand that since a percent increase or decrease is a percent of an original amount, it makes sense to associate the original amount with 100% when solving problems.
- Reason about percentages as rates per 100 to solve percent increase and decrease problems.
- Encounter some situations where it is sensible to express the change in a quantity as a percentage of the starting amount.

- Demonstrating that when I know the new amount and the percentage of increase or decrease, I can find the original amount.
- Demonstrating that I understand that if I know how much a quantity has grown, then the original amount represents 100%.
- Demonstrating that I can use a double number line diagram to help me solve percent increase and decrease problems.

**FAMILY MATERIALS:**To review or build a deeper understanding of the math concepts, skills, and practices in this lesson, visit the Family Materials provided by Illustrative Mathematics Open-Up Resources. (Links to an external site.)Links to an external site. All Illustrative Mathematics Open Up Resources can be Downloaded for free at openupresources.org (Links to an external site.)Links to an external site.. Any additional HCPSS content is offered under a**CC Attribution Non-Commercial Share AlikeLinks to an external site.**license.