You might try searching "light hide" in the box to the left - it will tell you what mobs drop light hide and about what the percentage drop rate is.
One caveat - I don't believe any of these numbers are corrected for the actual numbers of people that are skinning as opposed to just looting - I wouldn't be surprised if a drop rate of 1-2% actually meant 5-10% among total animals skinned. For example, Great Goretusks in Westfall show a drop rate of 1.33 for light hide, but only 19.21 for light leather and 5.31 for medium leather. Since they always drop something when they're skinned, I would guess that skinning 26 of them should give you about 20 light leather, 5 medium, and 1 light hide.