The Pareto Principle, also known as the _________ rule, suggests that approximately 80% of outcomes result from 20% of efforts.

The correct answer is "80/20." The Pareto Principle, named after economist Vilfredo Pareto, states that roughly 80% of results come from 20% of efforts. It's a helpful concept for understanding where to focus efforts for maximum impact, whether in time management, resource allocation, or problem-solving. Recognizing this principle can lead to more efficient and effective decision-making.