Text width

I have a problem with editing css, so I want to edit text width to be around 70% because now the text is under the counter. Can someon help me how to achive that. If I change a width to 70% the whole <li> is on 70% width not just text. so the text has to break to 2nd row if width is more than 70%.

I hope that I have written sufficiently comprehensibly.

The page I need help with: [log in to see the link]