比 is one of the most commonly used Japanese kanji, and it also has a lot of special readings in addition to the standard onyomi and kunyomi readings.
ONYOMI 音読み
くら.べる kura.beru
KUNYOMI 訓読み
ヒ hi
Examples
指標は前月比4%上昇した。The index rose 4% from the preceding month.指標は前月比4%増の120.5に上昇した。The index advanced to 120.5, up 4% from the preceding month.日本の貿易依存度はGNP比としては必ずしもそう高くない。Japan’s dependence on foreign trade is not necessarily very high as a percentage of GNP.