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Ett tal delat med ett bråk

Om täljaren i ett bråk är en produkt kan bråket skrivas om genom att dela nämnaren med en av faktorerna i täljaren, t.ex.

\frac{3 \cdot 4}{5} = \frac{3}{5 / 4} eller \frac{3 \cdot 4}{5} = \frac{4}{5 / 3} .

Detta använder reglerna för division med bråk baklänges.

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