Smtownthrll, you've made some good observations about the situation you find yourself in. Personally, I suspect you'll need to do some more research before deciding whether this can be fixed.
I imagine the theatre is at the top of its cost curve... nothing really having been paid off yet. That can lead to sleepless nights on both sides. However, I'd ask what business prep you, or your tenant made before starting this project in the first place. I ask because you seem to indicate you're new to this market, as is the tenant.
I see new theatres in competitive markets open all the time, with good initial results. People will tend to flock to the new place, to check it out. There should have been a decent "honeymoon" period for your theatre.
On the other hand, a new tenant might not have booked the best films for your area, might not have scheduled showtimes well, promoted well, stocked and priced concessions in the best way for the market... all things that come with experience. That's hard to say from your description, but certainly possible.
While the situation might be fixable, especially if the tenant is making really bad choices, or you're expecting unreasonably high rents for a theatre, it's also possible that this might have just been a bad choice for the market or location you're in. Respectfully, I would also disagree with Robert's assertion that any theatre can be made profitable with proper operation. In many cases, it's just not worth banging your head against the wall for the couple of bucks it might bring you.
The earlier-posed question, why only two screens, is a valid one... especially if your theatre is booking first-run pictures. Although some here have even made single screen theatres work, in general theres just not enough turnover or variety offered with only two screens to make a theatre economy work well. There are exceptions, and I know of one twin in a nearby small town that seems to be doing OK, but it's far from a sure thing.
The point here, is that more needs to be known about what's going on in your case. Going to a percentage lease is risky, and only prolongs the pain of a poorly performing business, in my opinion. I see those kinds of situations where a landlord can make more money as a business succeeds, and is willing to participate in its cost of operations... possibly by taking on more of the costs of maintaining the infrastructure, covering cam costs and possibly any property-wide advertising contracts.