The problem with your calculation is that total cases confirmed actually exceed the sum of the deaths and recoveries. There are many confirmed cases for which the patient has not died but recovery has not been confirmed.
See the statistics at https://epidemic-stats.com/
When I most recently checked this site, the statistics were as follows:
Confirmed cases - 12,209,187
Total deaths - 259,737
Recoveries - 7,282,805
These numbers yield a percentage of deaths of only 2.1%, which is significantly lower and more in line with expectations.