Scale Leaderboard Ads + Some layout changes

I need someone to scale and center a couple leader ads on my mobile layout and my AMP mobile layout. By scale I mean need to be able to see the full ad just smaller. I also need someone to center a leader board on the main page of my site for desktop and mobile. For some reason it's floating to the left. I managed to get two of the three leaders I need scaled on the mobile post view pages of wordpress, but the one in the middle of the page, it does not scale correctly with the code my ad company gave me. For some reason it's only displaying HALF the banner, instead of a full sized banner scaled. I have attached some screenshots. This job should be fairly easy to a CSS expert and should only take less than an hour. I would do it myself, but I don't have the time. Message me for more details. The website is [login to view URL]