Of the total area that is used by humans (Agriculture, Urban and Built-up Land),
- urban and built-up land is 1m km²,
- agriculture is 48m km²,
so agriculture is 48 of 49 millions km² used, that’s 98%. The remaining 2% are all streets and housing and other infrastructure together.
They didn’t really omit that as an oversight, it’s just not relevant to their thesis - agricultural land used for animal feed is not super relevant to the disparity in land utilization, as 80% of all agricultural land usage is pasture/grazing. Only 7% of agricultural land is used for growing animal feed.
Agreed about being a little mean though, although I do sympathize with being frustrated about this as AG land use is a very often misunderstood statistic.