8th Grade Percent of Change Quizzes

In 8th grade, percent of change is primarily a review concept that is applied in more complex, pre-algebraic contexts. It is used to analyze data, understand functions with a constant percent rate of change (an introduction to exponential growth), and solve problems involving scientific notation.

Frame percent of change as an application of linear functions. A problem like, "A town's population of 500 grew by 10%," can be modeled with the equation y = 1.10x. This approach connects the arithmetic of percents to the algebraic concepts of slope and functions.

The problems on these quizzes serve as a robust review by incorporating more complex numbers, such as decimals and fractions. Many problems also require multiple steps or ask students to work backward to find an original value, reinforcing algebraic thinking.

If an 8th-grade student still divides by the new value instead of the original, it signals a foundational gap in proportional reasoning from 7th grade. Another red flag is difficulty setting up a simple algebraic equation to model a percent change scenario, indicating a struggle to transition from arithmetic to algebra.

These quizzes are available as both printable PDFs for offline work and interactive digital assignments on Wayground. The included answer key makes for quick grading, whether you're checking paper copies or reviewing results from a digital session.

For students who have mastered the concept, challenge them to create their own multi-step percent change problems. For those needing review, use Wayground's digital "Read Aloud" feature for complex word problems or assign a scaffolded version of the quiz with simpler numbers.