Correspondence of percentages in -100 to +100

Hello,
I do not think that it already exists, but if it was the case tell me and I will delete this post.
Here is the table of correspondence.

It may not be clear, but the values from -100 to 100 are percentages. I think the only place it matters is the mult mixer type in the advanced GUI though.

The formula is simple enough: if you have a 0-100 value and want a -100-100 one, just double the value and subtract 100. (or subtract 50 and then double it, whichever is easier).

Likewise, if you have a -100-100 value and want a 0-100 one, subtract 100 and then divide by two (or divide by two and subtract 50).

I'm sorry, I removed the picture.