This kanji has a stroke for one atop 白 white. The latter is probably a representation of a thumb, which in ancient China was used to indicate a hundred. So, this kanji means one hundred.

Vocabulary

Vocabulary Reading Meaning
⭐ 百 ひゃく one hundred
⭐ 百パーセント ひゃく・パーセント one hundred percent; completely
百万 ひゃくまん one million; many
九百 きゅうひゃく nine hundred
百貨店 ひゃっかてん department store
百科全書 ひゃっかぜんしょ encyclopedia
数百 すうひゃく several hundred
八百屋 やおや greengrocer; jack-of-all-trades
八百長 やおちょう fixed (rigged) match