How do I change line spacing in writer to what in word would be called 1,15?

[Katja]

I have exams next week, and it is a demand that the line spacing is 1,15, but since I don’t use word, this is not an option directly… I see I can choose between proportional, at least, leading and fixed, but does anyone know what to set any of those settings to, to get what in word would be 1,15 line spacing?
Im using writer version 4.3.7.2

Thank you very much

[mariosv]

[horst]

In the windows of m.a.riosv set line spacing to Proportional and 115%.