Per100

Per100 is a rate expressed as the number of occurrences per 100 units of a given base, used to describe proportions, incidences, or densities in a standardized form. It is closely related to percentages, since a quantity expressed as a percentage is numerically equivalent to a per100 quantity. However, the phrasing per100 emphasizes the rate relative to a fixed denominator of 100 and is frequently used in epidemiology, quality control, and statistics where explicit base-size is helpful for comparison.

Calculation: per100 value = (observed quantity / base quantity) × 100. Example: in a population of 2,000, if 34 events occur, the rate per100 is (34/2000) × 100 = 1.7 per 100 people per observation period.

Differences and context: When the base equals 100, numeric equivalence with percent holds; otherwise, per100 is a way to express the same proportion in a different framing. It is distinct from per thousand or per million, which use larger denominators and yield smaller numerical values for the same underlying rate.

Applications: per100 is used to communicate risk, incidence, or performance in fields such as public health (incidence per 100 people), manufacturing (defects per 100 items), and sports analytics (points per 100 possessions). Researchers also report rates per 100 person-years to account for time at risk while avoiding decimal fractions.

Limitations: The term requires clear definition of the base and the time or condition governing the measurement to prevent misinterpretation.