Coinmarketcap is showing something like an average price of the particular coin from ALL markets where is it traded. Sometimes the exchange prices could be different which makes the average price inaccurate.
What about Helbiz. It probably shows it comparing to the time this coin is listed on CMC. If you open charts you will see that it was only listed somewhere around 5 a.m. I guess this is why the % change could be diffetent from the exchanges.
I have the same presumptions on where CMC do make use of average percentage on all the exchange on where the coin is listed. We dont know whats actually with CMC with percentage differences but this isnt really a big deal to me as have been said above if you would try to check out on any exchange percentage difference you wont see theres no big price gap which you would able to worried about.