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signs). There also exists an Arabic-Indic permyriad: .

Related units

* Percentage point difference of 1 part in 100
* Percentage (%) 1 part in 100
* Per mille (?) 1 part in 1,000
* Per cent mille (pcm) 1 part in 100,000
* Parts per million (ppm) 1 part in 1,000,000

See also

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