At least 14%. From their own page:

"Federal funding is essential to public radio's service to the American public and its continuation is critical for both stations and program producers, including NPR."

>7% Federal appropriations via CPB

>7% Federal, state, and local governments

Source: https://www.npr.org/about-npr/178660742/public-radio-finance...

Furthermore, NPR was built by public funding: https://en.wikipedia.org/wiki/Corporation_for_Public_Broadca...

>Tesla and SpaceX get far more public money than NPR does.

And neither one is a media organization, so I'm not sure why that's even relevant.