To come to a “common denominator”: where, apart from mathematics, is it needed?

Common denominators are used in many different areas of life outside of mathematics. In the business world, common denominators are often used to compare different metrics, such as revenues or profits, across different companies or products. This allows for a more accurate comparison of performance as all companies or products are compared on the same scale.

In the medical field, common denominators are used to compare different treatments or therapies for a particular condition. By using a common denominator, such as the number of patients that responded to a particular treatment or the number of patients that experienced a particular side effect, it is easier to compare the effectiveness of different treatments.

Common denominators are also used in the social sciences to compare different cultures or countries. By using a common denominator, such as GDP per capita or life expectancy, it is easier to compare the economic and social development of different countries.

In short, common denominators are used in many different areas of life outside of mathematics. They provide a useful tool for comparing different metrics, treatments, and cultures, allowing for a more accurate comparison of performance and development.