Upgrading percent

[maganar1]

Can some1 say me what is the USKO > ip < on the past ''server'' in knight online? thanks.

[brutalsnake]

all upgrades are 50/50 it will either succeed or burn.

oh yea, you are so smart, so when im gonna make +1 to +5 its same probability as +5 to+9 right?

[Funky]

might not be as acurate 21 % going to +10? that a very high rate.

[Jimmei]

High class upgrade (Bus)
+1 >> +2 %120
+2 >> +3 %120
+3 >> +4 %110
+4 >> +5 %105
+5 >> +6 %80
+6 >> +7 %50
+7 >> +8 %30
+8 >> +9 %25
+9 >> +10 %21

And what does it mean by having a success rate of higher than 100%...?