1999 Plymouth Voyager front pasenger brake rubbing

It sounds like the caliper piston is sticking and also the slides on the caliper are bad. Normally, under these conditions, I replace the caliper. If you want, you can check to see if the piston is frozen in place as well as remove the slide pins, clean them and lubricate them. If the piston is free, the slides could be the entire problem. Considering the inner pad is tight and the outside is loose, that leads me to believe that is the problem.