ratio

nouns

the relative magnitudes of two quantities (usually expressed as a quotient)
ratio
is a type of (narrower)
a relation between magnitudes
magnitude relation, quantitative relation
the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree
"an inordinate proportion of the book is given over to quotations"; "a dry martini has a large proportion of gin"
proportion, ratio