Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: 'calculation, reason', from ratus; RATE1

ratio

 noun
     
Related topics: Maths
ra‧ti‧o S3 W3 plural ratios [countable]
HM 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
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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