# Ratio definitions

rā'shō, rā'shē-ō'
Relation in degree or number between two similar things.
noun
A fixed relation in degree, number, etc. between two similar things; proportion.

A ratio of two boys to three girls.

noun
The relative value of silver and gold in a currency system that is bimetallic.
noun
A relationship between two quantities, normally expressed as the quotient of one divided by the other; for example, the ratio of 7 to 4 can be written 7:4 or 7/4. A ratio can often also be expressed as a decimal or percentage.
noun
The relative value of gold and silver in a currency system based on both.
noun
The quotient of one quantity divided by another of the same kind, usually expressed as a fraction.
noun
The definition of a ratio is the relationship between two things.

An example of a ratio is four chocolates for every three completed homework assignments written as 4:3.

noun
A relationship between two quantities, normally expressed as the quotient of one divided by the other. For example, if a box contains six red marbles and four blue marbles, the ratio of red marbles to blue marbles is 6 to 4, also written 6:4. A ratio can also be expressed as a decimal or percentage.
A number representing a comparison between two things.
noun
(arithmetic) The relative magnitudes of two quantities (usually expressed as a quotient).
noun
(law) Short for ratio decidendi.
noun

### Origin of ratio

Latin ratiō calculation from ratus past participle of rērī to reckon, consider ar- in Indo-European roots