A percentage is a portion of a whole expressed as a number between 0 and 100 rather than as a fraction. All of something is 100 percent, half of it is fifty percent, none of something is zero percent.

To determine a percentage, you divide the portion of the whole by the whole itself and multiply by 100. So if you just ate two pieces of an eight-piece pie, and you want to know what percentage of the pie you consumed, you'd first divide 2 by 8 which equals .25. Then multiply .25 times 100 and get 25 percent. A percentage can also mean a portion of something but only when it has to do with numbers. When you buy furniture, the salesman gets a percentage of what you spend.

Definitions of percentage
  1. noun
    a proportion in relation to a whole (which is usually the amount per hundred)
    synonyms: pct, per centum, percent
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    absentee rate
    the percentage of workers who do not report to work
    occupancy rate
    the percentage of all rental units (as in hotels) are occupied or rented at a given time
    vacancy rate
    the percentage of all rental units (as in hotels) that are unoccupied or not rented at a given time
    unemployment rate
    the percentage of the work force that is unemployed at any given date
    hospital occupancy
    occupancy rate for hospitals
    hotel occupancy
    occupancy rate for hotels
    type of:
    the quotient obtained when the magnitude of a part is divided by the magnitude of the whole
  2. noun
    assets belonging to or due to or contributed by an individual person or group
    synonyms: part, portion, share
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    a portion of something (especially money)
    a share that has been dispensed or distributed
    a share of money or food or clothing that has been charitably given
    a portion of something divided into shares
    a fixed portion that is allotted (especially in times of scarcity)
    an amount allowed or granted (as during a given period)
    piece, slice
    a share of something
    a promised or claimed share of loot or money
    interest, stake
    (law) a right or legal share of something; a financial involvement with something
    profit sharing
    a system in which employees receive a share of the net profits of the business
    a share of the profits
    allocation, allotment
    a share set aside for a specific purpose
    funds advanced to a prospector or to someone starting a business in return for a share of the profits
    controlling interest
    ownership of more than 50% of a corporation's voting shares
    insurable interest
    an interest in a person or thing that will support the issuance of an insurance policy; an interest in the survival of the insured or in the preservation of the thing that is insured
    vested interest
    (law) an interest in which there is a fixed right to present or future enjoyment and that can be conveyed to another
    security interest
    any interest in a property that secures the payment of an obligation
    terminable interest
    an interest in property that terminates under specific conditions
    undivided interest, undivided right
    the interest in property owned by tenants whereby each tenant has an equal right to enjoy the entire property
    an interest in land capable of being inherited
    rake-off, vigorish
    a percentage (of winnings or loot or profit) taken by an operator or gangster
    a share that has been allocated again
    a proportional share assigned to each participant
    privy purse
    allowance for a monarch's personal expenses
    the ownership interest of shareholders in a corporation
    (law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)
    (frequently plural) the interest possessed by law or custom in some intangible thing
    type of:
    anything of material value or usefulness that is owned by a person or company
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