In the placebo arm of the study (161 people), a total of 16 were reported to have fallen during the study. That was 9.9% of the people in the placebo arm (who got no blarcamesine).
Over in the blarcamesine-treated arm of the study there were 301 people, of which 21 were reported as falling during the study. That's 7.0% of the participants.
The straight facts: 9.9% of the study participants not taking any blarcamesine had falls. Of those on the drug, only 7.0% fell. No other way to interpret this. Blarcamesine reduced the chances of falling.