I am an LPN on the rehab unit of a combination rehab/LTC facility. On the rehab unit, we have 1 nurse for up to 25 patients with 2 CNAs, drops to 1 CNA if census goes below 11. If census does hit 21, we get a 2nd nurse for 6:00-10:00 shift, then back to 1 nurse. If goes above 25, then 2 nurses. On the LTC floors, it is typically 1:20-25 with varying number of CNAs depending on mobility of the residents.