- Great for online learning and distance learning! Get your students successfully understanding the 7th Grade RATIOS AND PROPORTIONAL RELATIONSHIPS (unit rates, constant rate of change, percents) with this PowerPoint Presentation BUNDLE. This bundle includes 6 PowerPoint Lessons that are designed to teach students how to analyze proportional relationships and use them to solve real-world and mathematical problems. These lessons cover the entire RATIOS AND PROPORTIONAL RELATIONSHIPS unit. E