(There must be perfect keyboard configuration files for your model/layout).
Anyway, The old way:
1 - find those keys:
$ xmodmap -pke | grep -Pw "degree|less" > mychanges
2 - edit "mychanges" to swap the keys. You probably have something like:
keycode 94 = less greater less greater bar brokenbar bar
keycode 49 = dead_circumflex degree dead_circumflex degree U2032 U2033 U2032
Swap the keys codes to:
keycode 49 = less greater less greater bar brokenbar bar
keycode 94 = dead_circumflex degree dead_circumflex degree U2032 U2033 U2032
3 - activate the changes with
xmodmap mychanges
4 - if your are happy with the new behaviour, do
cat mychanges >> ~/.Xmodmap
This approach can be used to generic keyboard changes (in graphic mode)