Percent
Percent was a mathematical term, expressing the number of something as a fraction of one hundred.

Starships counted the strength of their force fields, life support system, hull plating, and weapons in percent during an attack. ()

Milk was classified by its percentage of fat. Two percent milk was available from 's drink dispenser. ()

Examples 
When the Borg assimilated the transport Arctic One in 2153, they'd increased its mass by 3 percent when  first met them. ()

In 2267, Earth probe Nomad attacked the , which caused the deflector shields to absorb energy equivalent to ninety of the ship's photon torpedoes. The energy used for the shields to repulse the attack reduced shielding power twenty percent. According to Spock, they could resist three more such attacks, while a fourth would shatter their shields completely. Nomad later made alterations to the ship wwhich increased engine efficiency fifty seven percent. However, this threatened to destroy the ship as Its structure not stand the  of that much . ()

In 2366, an attack on the  by a  Romulan warbird resulted in a seventy percent loss to deflector shields. ()

In 2372, the Ferengi imposed an unfair 6 percent tariff on woolen goods they traded with the Karemma, claiming that the tax was added to help offset the "lost income of Tarkalean sheep herders." ()

In 2374, the blood pressure of Jadzia Dax dropped by 20 percent. ()

Slug-o-Cola contained 43 percent live algae in every bottle. ()

The same year, Seven of Nine was given a list of dietary requirements by The Doctor; "two hundred fifty grams glycoproteins consisting of 53 percent polypeptides and 26 percent fibrous glycogen". ()

In 2374, the female population on Ferenginar made up 53.5 percent. ()

Over 70 percent of the organisms on Earth are bacteria. ()

External link 
 

Mathematics