Finding 900 Korok Seeds brings you to 72% completion in LoZ: BotW.

This page has the completion percentages for The Legend of Zelda: Breath of the Wild.

Name How Many Percentage Each Percentage Total Note
korok seeds 900 0.08% 72% Use the Korok Seed Map to find all korok seeds.
locations 350 0.05% 16,88% 139 tied to Shrine names, Tower names and Divine beast names
shrines 120 0.08% 9,6% Use the Shrines Map to find all shrines.
towers 15 0.08% 1,2%
divine beasts 4 0.08% 0,32% You need to kill boss and free the 4 divine beasts