For one thing, throw in another 20% for asymptomatic people. Studies show about 1 out of 5 people infected never show symptoms. So they aren’t in the total. We are also not testing everyone. So it’s missing more people there.
The statistics seem to point more towards a death rate between 0.75% and 1%. The large majority of which are people over the age of 65 or have other underlying conditions.
Actually the number of asymptomatic and mild cases not touching the medical system are 85% - 90%.