noun
A mathematical term for a ratio expressed as a fraction of 100. Often used in statistics, finance, and everyday comparisons.
このグラフは、各項目の百分比を示しています。
This graph shows the percentage of each item.
百分比で表すと、約25パーセントになります。
Expressed as a percentage, it is about 25 percent.
割合 is a broader term for 'ratio' or 'proportion', not necessarily out of 100. 百分比 specifically means a percentage.
Compound of 百 (ひゃく, 'hundred'), 分 (ぶん, 'part'), and 比 (ひ, 'ratio'). The term is a direct translation of the Western mathematical concept of percentage.