Hey! Thanks for bringing that up for attention. Now I have a reason I can state why I'm still in silver after so many years.
But yeah, that shouldn't happen. Usually numbers and stuff is pulled directly from a database, so we don't have to change it everytime we change numbers. All the buffs and nerfs every second week... It looks like in this case there is a stray %. Usually we would write it 20% in German, here it is shown as 20 %.