If you are interested in calculating these, see
http://wizardofodds.com/sports/sports_apx3.html
In the recent discussion of a money line bet of
-180/+170, we would use 175 (as mentioned by Tom) to calculate the
probability: 175/(100 + 175) = 7/11 ~ 63.64%.
So the odds are 7 to 4 that the "favorite" will win.