👉 In mathematics, a dimensionless number is a quantity that can be expressed in terms of one or more other quantities without changing its value. For example, the dimensionless number 2/3 can be thought of as the ratio of two numbers. A dimensionless number is defined by its value and the relationship between it and all other dimensions. This means that there are no units associated with a dimensionless number, which makes them useful in situations where one quantity depends on another but has no effect on
