1993 Jeep Laredo Fluid leak near wheels

I have a 1993 Jeep Grand Cherokee with 197,000 miles. It is leaking fluid out near one of the rear wheels and also out of the bottom of the rear differential. I am thinking that it is differential fluid that is leaking out near the wheel since it's coming out of the differential itself also. Is this correct? Also I would like to know what all is involved in fixing a differential fluid leak near the hub like that? I am pretty sure the differential itself would be easy enough but not sure what I'm dealing with in regards to the leak near the wheel. Thanks for your help