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Promille

Promille betyder tusendelar.

1

promille (eller

1

tusendel) kan i bråkform och decimalform.

Bråkform	Decimalform	Promille
$\frac{1}{1 0 0 0}$	$0.001$	$1 ‰$

Promille uttrycks genom att sätta symbolen $‰$ efter promillesatsen. Om man har ett bråk som kan förlängas eller förkortas så att nämnaren blir 1000 kan man göra detta först, och därefter läsa av promillesatsen i täljaren, t.ex. $\frac{7}{5 0 0} = \frac{1 4}{1 0 0 0} = 14 ‰ .$

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