Please explain further. I understand the 4% to be that which we are able to perceive by our 5 senses.
As others have noted (sort of) we don't sense anything like 4% of the universe with our 5 senses. It might be more like 0.00000000000000004% (actually probably a lot lower). Most of the "normal" matter of the universe is way, way to far away to "see". We can "see" maybe 3 galaxies of the 100's of billions that are there.
For all the rest we use instruments of many sorts.