Hello, I was playing with kbruch today and it gave me this 1½ * 1⅖ = To which I replied ⅕, which it marked wrong saying it should have been 21/10. I asked other people (who have studied math at university, like me) and they were all very surprised. Then I asked on IRC and a german person said it was correct, and sent me a wikipedia link (https://en.wikipedia.org/wiki/Fraction#Mixed_numbers) From that wikipedia link, I went to the Italian version of the page (https://it.wikipedia.org/wiki/Frazione_(matematica)#Altri_tipi_di_frazioni) where all such fractions are written with a + sign. There is a note saying that anglosaxon countries might omit the + sign. So to any italian national, writing 1½ is not the same as (1+½). To us the question is identical to ½+⅖. Can you please consider using the international notation if the locale is not set to USA/Germany/{I don't know who else uses this notation}? Thanks
Spanish friend who lives in sweden said to him it's ⅕ but not to his son who goes to school in sweden.
The UI provides the option to disable this notation as it is not used everywhere. I believe in English the checkboxes are called "mixed numbers". It is a one-time setting as your settings are saved.
Deep-link to handbook where this is also explained: https://docs.kde.org/stable5/en/kbruch/kbruch/exercises.html#task_paras