最小公分母

zuìxiǎogōngfēnmǔ
lowest common denominator

CEDICT

  1. (mathematics) least common denominator; lowest common denominator
  2. least common denominator; lowest common denominator

Wiktionary

有相异分母的诸分数，可以同分母的分数表示，此公分母以最小者为便。算术上所用最小公分母，即诸分母的最小公倍数。

重編國語辭典

Entry Composition

1 最小 zuìxiǎo smallest; youngest; least; minimum; minimal
2 公分母 gōngfēnmǔ (math.) common denominator