Yes, this the behavior for percentage unite with padding property (even top and bottom padding) it always calculated relative to element's parent width.
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Wrong answer: I choose 300px and 200px.
I thing it's the correct because box have no content.
Please explain why
Because padding is always calculated from the width.
i am also agree with @Camilo's answer.
Yes, this the behavior for percentage unite with
paddingproperty (even top and bottom padding) it always calculated relative to element's parent width.