Topic: MATHS
| Date: | 1600-1700 |
| Language: | Latin |
| Origin: | 'calculation, reason', from ratus; RATE1 |
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ra‧ti‧o S3 W3
plural ratios [countable]
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 nursing staff to doctors is 2:1.