“If Israel shot down 99% that leaves 1% that got through.”
They hit 99% of the ones they aimed for. Ones that weren’t going to hit anything didn’t need to be targeted.
Probably true. And it might be 99% of the ones that made it past the interceptors from Jordan and Iraq. So after you filter out the ones that other folks intercepted, and the ones like you said that were going to hit nothing targets in the desert, it's probably 99% successful interceptions of a much smaller number than 300.
IMHO 99% of a small number is still an awesome success. Especially to those of us old enough to remember the egg heads at MIT and other Dims saying missile defense wouldn't work, that "you can't hit a bullet with another bullet". Evidently you can.
They also forced Israel to shoot up to a billion dollars, shooting down a few hundred $5000 drones.
Question: Iran is spending a few million to launch mostly cheap drones before sending over the kill shots, while Israel is spending billions. How many of these volleys can Israel sustain?
Answer: Not many -- just like the Ukies
It's called war of attrition. He who has the most bullets wins.