ratio

Relation in degree or number between two similar things.

The relative value of silver and gold in a currency system that is bimetallic.

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.

The relation between two similar magnitudes in respect to quantity; the relation between two similar quantities in respect to how many times one makes so many times the other.

Proportion of relations or conditions; coincident agreement or variation; correspondence in rate; equivalence of relative movement or change.