How much are fees for Bitcon and Ethereum itself?

[adrian2xy]

Hi, i am new, i am interested how much are fees for bitcoin and ether by themselves (no other fees).

In example, let say i bought Bitcoins for 100 Euros. One minute later i sold Bitcoins back to Euros (lets presume that Bitcoin course stayed the same all the time and exchange charged 0% fee).
How much Euros i have now? 100 or less?

Same question for Ethereum. I bought Ethereum for 100 Euros. Right after i sold them back for Euros. How much Euros do i get?

Thanks