HELP!!!!!! math lerp and variables

okay so here the deal i have a slider with a max value off 200 and a minimum value of 100
this controls a objects speed
i have an animation that goes from 0 to 1

i want a way to make the slider affect the animation aswell without changing any of these set value or without doing / 2 then /100 maybe using a lerp but im a noob to this

You want to use InverseLerp.

Mathf.InverseLerp(100f, 200f, yourValue);