Dear Wolfram Community

The function f is sought. The function takes two parameters l and v. The function f asymptotically approaches 100. When l increases, the output of function f decreases. When v increases, the output of function f increases. Here are some values and the corresponding output of the function:

The variable l just can have values between 1 and 40.
Whenever v is 0, the output of f is 0.

Here are some more values:

• f(l;v) = y
• f(1;0) = 0
• f(1;4) = 16 2/3
• f(1;5) = 20
• f(1;20) = 50
• f(1;30) = 60
• f(1;60) = 75
• f(l, infinite) = 100

• f(10;1) = 1,25

• f(10;11) = 12,25
• f(10;20) = 20,25
• f(10;11) = 12,25
• f(10;40) = 33 2/3
• f(10;78) = 49,75
• f(10;100) = 55,93
• f(10;150) = 65,56
• f(10;200) = 71,74
• f(10;250) = 76,04

• f(40;1) = 0,26

• f(40;10) = 2,51
• f(40;50) = 11,39
• f(40;100) = 20,45
• f(40;200) = 33,95
• f(40;500) = 56,24
• f(40;1000) = 71,99
• f(40;1500) = 79,4

I am looking for a mathematical way to find the function. I think it may be a logarithmical or asymptotical function.

Greetings and thanks for reading
Felix