Ad Sharing Split

I notice that the dropdown from my ad sharing plugin says …

site 25% / site 75%

site 50% / site 50%

site 75% / site 25%

Since I am using the sitewide text change to replace “blog” with “site,” I am presuming it is replaced here and I have obfuscated myself.

Which is the blog, the left or the right item in the split?

Old fogey’s do get lost in the woods, you know.