If function with round formula

Hey,
I am trying to make a formula that at first will give me some text if # of managers is 0 and if it’s bigger it will calculate a % and round it.
I have this:
if({# managers}=0,“No managers”,ROUND(({# managers logged in (≥2 days)}/{# managers}*100),1))
But it doesn’t work…
Would love your help!