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.
You can see this very clearly flying almost anywhere. It’s most obvious in places like the Midwest US, but even between cities in more densely populated regions, there’s so much farmland. Islands of concrete in oceans of ordered crop fields.