The capacity of a pail was recorded as 0.5 liters after being rounded off to 1 decimal place. If the pail had a capacity of less than 0.5 liters, write down a possible capacity.
Since the capacity of the pail was rounded off to 0.5 liters after being rounded off to 1 decimal place, it means that the actual capacity of the pail is somewhere between 0.45 and 0.55 liters.
Therefore, a possible capacity that is less than 0.5 liters could be 0.45 liters.