35% of all those infected with COVID-19 do not show symptoms.
0.4% is for all ages combined is the fatality rate for COVID-19, for the 65% of those that first show symptoms says USA CDC after quite complicated analysis.
Ages 65+ fatality rate for those who show symptoms is 1.3%
Ages 65+ “have to go to the hospital for treatment” rate is 7.4%
Ages 0-49 fatality rate for those who show symptoms is a very low 0.05% which is about half the normal yearly average influenza fatality rate.
Note in the report “ratios” rather than percentages are given so that there is a factor of hundred difference. Example: 0.01 is given rather than 1%