Ratio

Definition by words	Kind-of-quantity of component F divided by same kind-of-quatity of component G in system 1
Definition by equation	Note 1: Kind-of-quantity in the numerator and denominator is the same kind-of-quantity Note 2: Component F ≠ Component G (≠ = “not equal to”) Note 3: Component F $\notin$ Component G ( $\notin$ = “is not an element of”) (In this terminology, the quotient of component F and component G is usually denoted as component B)
Scope	“Ratio” is a modifier (adjective) to a kind-of-quantity.
Description	The measurement units for related ratio kinds-of-quantity are numerical values from 0 to inifinity, $\text{[math]}$ (or what is physiological possible)
Reference	Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. doi:10.1039/9781782622451.