Looking for an engaging Percent Increase and Decrease Word Problems activity? This no-prep Percent Increase and Decrease Word Problems mystery review gives students 15 real-world practice problems in a fun, clue-based format. Students will practice Percent Increase and Decrease Word Problems as they eliminate suspects, locations, and motives to solve the mystery.Instead of a regular worksheet, students work through each situation, determine whether the problem shows an increase or decrease, find