Per Centum May 2026

If a whole is divided into 100 parts, a "percentage" indicates how many of those parts make up the subset being discussed.

The term evolved over time. "Per" was often abbreviated to "p", and "cento" was contracted until it eventually became the modern symbol: %. per centum

Parts per 10,000 (one-hundredth of 1 percent). Per Cent Mille (pcm): Parts per 100,000 (1 in 100,000). If a whole is divided into 100 parts,

The phrase emerged from per centum (16th century), and its usage was heavily refined by Italian merchants, who frequently used "per cento" for calculating taxes, interest, and discounts. 000 (1 in 100

A percentage breaks down any quantity into 100 parts, making it a standardized metric for comparison.

The core, simple formula for a percentage is