That’s a percent of all deaths.
Not a percent of people who contracted the flu.
You’re right, looks like about 26.4 million people in the USA have the flu at any given time in the Winter. So like maybe .0076% die from it per week? Lots of math, and unreliable #’s due to “unreported” flu cases...not everyone goes to the doctor/hospital for it...leading to “guesstimates”.