Which term is used to express proportions of a whole expressed as parts per hundred?

The term that is used to express proportions of a whole as parts per hundred is percentages. Percentages specifically denote a number as a fraction of 100, which makes it easy to understand and compare. The symbol "%" signifies that the number should be divided by 100, effectively illustrating how much of the whole is represented by the given figure.

For example, saying that 25% means 25 parts out of 100 parts of a whole, which can be more intuitive than dealing with fractions or decimals in certain contexts. This concept is widely used in statistics, finance, and everyday applications, making it a fundamental component in understanding proportional relationships.