In the entry it says this exactly:
Base productivity: 50%
For a while I thought this meant that the Foundry had a base productivity of one half. I was surprised then when I finally discovered that it was actually 150%.
If you hover over the building, it shows the productivity correctly as "+50%".
I propose adding a plus sign in the Factoriopedia entry to avoid confusion.
[Pard] [2.0.43] Foundry entry in Factoriopedia misleading about productivity
Re: [Pard] [2.0.43] Foundry entry in Factoriopedia misleading about productivity
This was fixed at some point.
I'm an admin over at https://wiki.factorio.com. Feel free to contact me if there's anything wrong (or right) with it.