My qestion is how do you find out how many degrees of latitude separtae each other. For example How many degrees of latitude separate (45N, 65W) and (32S, 65W)?

Thanks for your help

0° latitude is the equator.

So from 32S to 0° is 32 degrees.
From the equator (0°)to 45°N is 45°. The total is therefore 32+45=77°.