#percent__percentage__per_centum__percentum  a proportion multiplied by 100
  supertype:  proportionality__proportion  the quotient obtained when the magnitude of a part is divided by the magnitude of the whole
  subtype:  absentee_rate  the percentage of workers who do not report to work
  subtype:  batting_average__battingaverage  (baseball) the percentage of times a batter gets a hit; number of base hits divided by the number of times at bat
  subtype:  fielding_average  (baseball) the percentage of times a fielder handles a batted ball properly; number of assists and putouts divided by the number of chances
  subtype:  occupancy_rate__occupancyrate  the percentage of all rental units (as in hotels) are occupied or rented at a given time
     subtype:  hospital_occupancy  occupancy rate for hospitals
     subtype:  hotel_occupancy__hoteloccupancy  occupancy rate for hotels
  subtype:  vacancy_rate__vacancyrate  the percentage of all rental units (as in hotels) that are unoccupied or not rented at a given time
  subtype:  unemployment_rate  the percentage of the work force that is unemployed at any given date

No statement uses or specializes percent; click here to add one.