Meaning of RATIO in English

RATIO

ra ‧ ti ‧ o W3 AC /ˈreɪʃiəʊ $ ˈreɪʃoʊ/ BrE AmE noun ( plural ratios ) [countable]

[ Date: 1600-1700 ; Language: Latin ; Origin: 'calculation, reason' , from ratus ; ⇨ ↑ rate 1 ]

a relationship between two amounts, represented by a pair of numbers showing how much bigger one amount is than the other ⇨ proportion

the ratio of something to something

The ratio of nursing staff to doctors is 2:1.

ratio between

the ratio between profits and incomes

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.