Is this NuGet really needed in solution?

how can i tell which NuGet packages are required and which are not?

I got project in asp.net after someone else and there is tun of packages whit i assume is not needed. It there a better way than just deleting it and then checking if the web is working corectly?

Now there is 70 packages installed in the sollution. I am trying to delete all that are not necessary.

Thanks