Browse Definitions :
Definition

# per mil symbol

The per mil symbol is used in mathematics, and especially in economics, to indicate parts per thousand. The symbol resembles a fraction with zero in the numerator and a double zero in the denominator ( ).

Suppose m and n are two integer s. The ratio or quotient m / n is converted to a per mil value by multiplying by 1000, and then reducing the result to decimal form. Thus, for example, to convert 3/50 to a per mil value, we first multiply by 1000, getting (3000/50) , and then reduce this to its simplest form, obtaining 60 . If we have 3/5 and want to convert it to a per mil value, we follow the same procedure, obtaining (3000/5) which reduces to 600 .

If we have a decimal number and want to convert it to a per mil value, we multiply it by 1000. Therefore, 0.06 is 60 , while 0.6 is 600 .

Per mil values are sometimes used to indicate the extent to which a quantity increases or decreases. Such values can be greater than 1000, indicating an increase to more than twice the original value, or negative, indicating a decrease in a value. For example, suppose an aircraft is traveling at 50 meters per second (m/s). If its speed changes to 125 m/s, it is an increase of 75 m/s which is 1.5 times the original speed, so the speed is said to change by +1500 . If the speed changes from 50 m/s to only 10 m/s, it decreases by 4/5, or 800 , of the original speed, so the speed is said to change by -800 .

Per mil values are sometimes used to express the extent of an annual tax levy on a property, particularly real estate. For example, if the levy is 15 in a particular area, that means \$15 per \$1000 of assessed value. A \$300,000 house would thus be assessed an annual tax of \$300,000 x 15 , or \$4500.

Compare per cent symbol . Also see Mathematical Symbols .

This was last updated in September 2005
• compliance risk

Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

• information governance

Information governance is a holistic approach to managing corporate information by implementing processes, roles, controls and ...

• enterprise document management (EDM)

Enterprise document management (EDM) is a strategy for overseeing an organization's paper and electronic documents so they can be...

• cipher block chaining (CBC)

Cipher block chaining (CBC) is a mode of operation for a block cipher -- one in which a sequence of bits are encrypted as a ...

• block cipher

A block cipher is a method of encrypting data in blocks to produce ciphertext using a cryptographic key and algorithm.

• hacker

A hacker is an individual who uses computer, networking or other skills to overcome a technical problem.

• risk mitigation

Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

• call tree

A call tree is a layered hierarchical communication model that is used to notify specific individuals of an event and coordinate ...

• Disaster Recovery as a Service (DRaaS)

Disaster recovery as a service (DRaaS) is the replication and hosting of physical or virtual servers by a third party to provide ...

• cloud storage

Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, ...

• cloud testing

Cloud testing is the process of using the cloud computing resources of a third-party service provider to test software ...

• storage virtualization

Storage virtualization is the pooling of physical storage from multiple storage devices into what appears to be a single storage ...

Close