The term "0.1%" refers to a fraction that represents one-tenth of one percent. In numerical terms, it is equivalent to 0.001 when expressed as a decimal. This small percentage is often used in statistics, finance, and various scientific fields to indicate a very minor portion of a whole. For example, if a population of 1,000 people has 0.1% of its members affected by a certain condition, that would mean only one person is affected. Similarly, in finance, a 0.1% fee on a $1,000 transaction would amount to just $1, highlighting how small percentages can have minimal impact in certain contexts.