I did teacher's college in Canada and the teacher who taught math said his biggest surprise when he moved from Europe to Canada is how terrible people were with

I did teacher's college in Canada and the teacher who taught math said his biggest surprise when he moved from Europe to Canada is how terrible people were with fraction. I think he asked a barista to fill his cup to 2/3 and they couldn't do it because they didn't know what 2/3 was.