The expression "1/n" represents the mathematical concept of a fraction where "1" is the numerator and "n" is the denominator. This means that "1/n" indicates one part of a whole that is divided into "n" equal parts. For example, if n equals 4, then "1/4" signifies one out of four equal sections. In practical terms, "1/n" is often used in various fields, such as mathematics, statistics, and finance, to describe probabilities, ratios, or distributions. It helps in understanding how a single unit relates to a larger group, making it a fundamental concept in both theoretical and applied contexts.