Please help calculating, I suck at math :/

[FannyShaver]

Let's say there is an ability which's effect starts ONLY at level 10 and has a chance to cast a few effects on the target, that's why it needs triggering.

10 - 30%
20 - 37.5%
30 - 45%
40 - 52.5%
50 - 60%
60 - 67.5%
70 - 75%
80 - 82.5%
90 - 90%
100 - 97.5%

I don't need triggering help, just making an arithmetic calculation of the chance :/ I am completely out of ideas. Thanks for any help.

 

[GFreak45]

if a random integer between 1 and 1000 is less than %x100 then do the actions
so rank 1, if random integer is less than 300
rank 2 less than 375
etc

 

[FannyShaver]

I guess it will have to include an ability level check in the integer somehow.
/edit

Random integer 1-1000
RI =< 200+ (75xabilitylvl)

 

[GFreak45]

225+(75x ability lvl) to get your exact parameters
but you get the picture

 

[KaerfNomekop]

• Set TempInt = (Level of YourAbiliity for YourUnit)
  • Set TempReal = (22.50 + (7.50 x ((Real(TempInt)) / 10.00)))
  • Set TempReal2 = (Random real number between 0.00 and 100.00)
  • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
    • If - Conditions
      • TempReal2 Less than or equal to TempReal
    • Then - Actions
      • YourActions
    • Else - Actions

 

[keychup]

If random real from 0.00 to 100.00 is less than or equal to (22.5 + (7.5 x ConvertInteger Level of ability to Real))