how you store the value depends largely upon what you will be doing with it.

For example, if you are merely storing and forwarding a text string "4.25" then you can leave it as a four character string.

More likely you wish to convert it into a value for setting an action limit. Here the algorithm used can make a difference. If you were allowing input for a discrete set of legal adjustment values like "1.00,1.25,1.50,...4.75" then it might be appropriate to convert the input into a table INDEX directly. 4.25 may only be subsequently useful as denoting that it points to the table adjustment record settings addressed by index 24 (whatever).

If you need 4.75 as an input to som computation then you might need to convert it into binary, floating point, or some bcd math-lib format.

The answers to you question are many until we know more. The above may help you choose a where you'd take it next.

aka j