Solids: solids are most compressed substances as they are hard n their molecules are tightly packed. They can't be further compresed(except rubber n spounge).
Liquid: liquids are comparatively less compressed then that of solids. The evidence is that their molecules are loosely packed and do not have any shape n size. They can be compressed further to some extent.
Gas: gasesa re least compressed as they fill th container completely, they do not have any shape and their molecules are packed extremely loose. They can be compressed extreamly either to make them solid or liquid.