Learning drops quickly over time

From “Building Better Bosses” in Workforce Magazine, May 2000:

Research shows that 30 minutes after adults hear new information, they will remember only about 8% of it. A day or two later, recall drops to 2%. But if people learn a little bit of information and practice it right away, retention balloons to 90% immediately and deflates to as much as 50% to 60% over time.