The factory is currently running at three-quarter 'capacity'. [=the factory is producing three quarters of what it can produce]
The airport is not expected to reach 'capacity' [=the highest number of planes it can deal with] for several years.
The restaurant has a large seating 'capacity'. [=many people can sit in the restaurant; it has many seats]
(..) The only living being that uses it's brain better than us... ...the dolphin. uses up to % of its celebral capacity. And in particular, this allows it to have an echo-location system that's more efficient than any sonar invented by mankind. But the dolphin did not invent the sonar. (..)2014 Lucy
(..) And with movement, interesting things began to happen. Animal life on Earth goes back millions of years. Yet, most specie only use -% of its celebral capacity. But it's not until we reached human being at the top of the animal chain, that we finally see a specie used more of its celebral capacity. (..)2014 Lucy