As far as I know, there are no votes demanding an absolute majority or super majority (constitutional changes are done by relative majority decision before an election and an exactly the same decision after an election). We even have a tradition - kvittning - where if one bloc is say two MPs short (for example due to illness or travel), two MPs from the other bloc abstains from voting.

So yes a minority government can make do with different relative majorities. This has more or less been the rule, however it has been stronger minority governments as they have had more seats themselves and typically needed only one extra party with several possible choices.

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