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%

https://www.cdc.gov/coronavirus/2019-ncov/hcp/planning-scenarios.html