Why is it die Ratio?

Ratio ends in -o, but that ending doesn’t settle the article: in a German dictionary, 45% of -o nouns take das, 43% take der, and 11% take die. So learn it with its article: die Ratio.

Which endings you can rely on
Sense 1
die

Meaning

[1] Language of education: Logically conclusive understanding of the reason

[1] bildungssprachlich: logisch schlussfolgernder Verstand; Vernunft

[2] Mathematics: ratio, quotient

[2] Mathematik: Verhältnis, Quotient

Examples

[1] "But the scientific ratio was not the decisive factor"

[1] „Doch die wissenschaftliche Ratio war nicht das Entscheidende.“

Declension

1 Singular Plural
Nominativ die Ratio —
Genitiv der Ratio —
Dativ der Ratio —
Akkusativ die Ratio —

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary