Per cent is a commonly used term in math and statistics, referring to a portion of one hundred. However, there are many synonyms that can be used interchangeably with per cent to convey the same meaning. Some examples are percent, percentage, and parts per hundred. Other variations include per hundred, per mil, and parts per thousand. In certain contexts, the word fraction can also be used to talk about a number expressed as a portion of one hundred. No matter which synonym is chosen, it is important to correctly express quantities and percentages in order to accurately and effectively communicate data and information.