Can make buff stat Arithmetic?

[Dehsalp]

My game has many buff and passive stat skill

As far as I know, it's a multiplication operation in the rpg maker mv.

how i make this multiplication to arithmetic?

 

[rainyday]

Yanfly's Buff State core lets you set the formula for your buff rate, and Yanfly's Base Param control plugin can let you change the buffRate from being multiplicitive to additive

 

[Soulrender]

Sorry to say, but your english is... never mind, but if I understand your intention you want to make a passive skill with dynamic value (changing depending on specific parameter of your actor instead fixed value like RMMV by default forces user.

You can do that by using Yanfly's BuffStateCore plugin.

and in your desired state put following code:

<Custom Turn End Effect>

//target.gainHp(your formula);
//for example
target.gainHp(-user.mat * 2);

</Custom Turn End Effect>