Studies have found that if you do nothing further with newly acquired knowledge, after a few hours you only retain a fraction of what you read, saw or heard. As more time goes on, your retention slides even further.
Learners Retain Approximately:
90% of what they learn when they teach someone else/use immediately.
75% of what they learn when they practice what they learned.
50% of what they learn when engaged in a group discussion.
30% of what they learn when they see a demonstration.
20% of what they learn from audio-visual.
10% of what they learn when they’ve learned from reading.
5% of what they learn when they’ve learned from lecture.
Ascension University — Source Material