Americans are rich and well-educated. Mercedes are reliable cars. To some extent, this is true of other populations, including manufactured items like automobiles. The point here is that, sometimes, context and convention may affect our understanding of even simple statements. The job of a critical thinker is to understand the statements as they were meant , rather than insisting on a purely literal construction.
China has about one-quarter of the world's population.
China has more than a quarter of the world's population. China has one-quarter of the world's population. Babe Ruth hit a lot of home runs. Babe Ruth hit 714 home runs. Babe Ruth hit less home runs than Hank Aaron.