100 percent; indicating a full amount or complete degree. Can be used literally or adverbially to mean completely.
この商品は100％天然素材で作られている。
This product is made from 100% natural materials.
私はその提案に100％賛成だ。
I am 100% in favor of that proposal.
果汁100％のジュースを買ってください。
Please buy 100% fruit juice.
彼の成功は100％努力のおかげだ。
His success is 100% thanks to his effort.