Sorry, there is an error in the math. The mortality rate is the number of deaths divided by the total number of diagnosed positive cases (the "denominator"). Given the variables provided, the mortality rate would be calculated to be 3.8%. Last week the mortality rate was trending down and stood 1.5% in the U.S. It has been a bad week for the U.S.!
Of course the number of positive cases (the "denominator") is not close to being accurate, as it does not account for those who have contracted the disease, but never diagnosed as positive. The researchers and statisticians tend to believe the actual U.S. SARS-CoV2 mortality rate will ultimately be in the range of .5% and .9%. By contrast the typical flu season usually sees a mortality rate of .1%