It would be easiest to convert them all to fractions out of 100. The bigger is is, the more likely it will happen - for example something with a 2/100 (2 out of 100 chance) of happening is less likely to happen than something with a 98/100 (98 out of 100 chance).
60% = 60/100
8 out of 10 = 8/10 = 80/100 (multiply 8/10 by ten)
0.37 = 37/100
20% = 20/100
5/6 = .83 = 83/100
When you put these in order from least to greatest you get:
