How to Lerp a number into range? [SOLVED]

How can you lerp for example 300 into a 0,1?

Make a big number be contained inside a range of 1?

To Lerp between 0 to +1 is :-
0 to 300 is the example variable.
Example:1/300×300 = 1
Example: 1/300×150 = 0.5

To lerp between -1 to +1 with a positive value at hand is :-
2/300×300-1 = 1
2/300×0-1 = -1

To lerp between -1 to +1 with a negative value is:-
2/300x(-300)+1 = -1
2/300×(-0)+1 = 1