Well technically, if you add both 'ends' of the sidewall, it's 70% of the section width. It's the new math they teach, don't ya know?
Really though, you are correct it's 235/35-20 according to the picture.
Not sure why you'd go so narrow on a 9" inch front and a 10.5" rear wheel (according to picture, rear @ spoke) though!
The wheels themselves don't look bad IMO, although be nicer if maybe the side of the spokes were black or gunmetal or something to break all the chrome. Disappointed to see Centerline wheels are made in china now though.