fraction

1 - Apart from the certain knowledge that life exists on earth, our only definite knowledge is that, at the best, life must be limited to a tiny fraction of the universe.

2 - Despite substantial price cuts, sales have increased only fractionally

3 - The world is teetering on the edge of a pandemic that could kill a large fraction of the human population.

4 - Scientific observation has so far probed only a fraction of the universe.

5 - Our achievements rest on the accomplishments of 40,000 generations of our human predecessors, all but a tiny fraction of whom are nameless and forgotten.