👉 Retention math is a method used to estimate how much information a person can remember from a learning session, typically based on the forgetting curve. It suggests that information decays exponentially over time if not reviewed or practiced. The basic formula is R(t) = R₀
e^(-kt), where R(t) is the amount of information retained after time t, R₀ is the initial amount of information, k is a constant that depends on the individual and the method of learning, and e is the base of the natural logarithm. This means that after a certain period, only a small fraction of the original information remains, emphasizing the importance of spaced repetition and review to enhance long-term retention.