1) Commensurateness 2) Pct 3) Percent 4) Percentage 5) Proportion 6) Proportionateness 
[law] Proportionality is a general principle in law which covers several special (although related) concepts. The concept of proportionality is used as a criterion of fairness and justice in statutory interpretation processes, especially in constitutional law, as a logical method intended to assist in discerning the correct balance between ...[mathematics] Consider dividing the largest rectangle in two triangles, cutting along the diagonal. If we remove two triangles from either half rectangle, we get one of the plain gray rectangles. Above and below this diagonal, the areas of the two biggest triangles of the drawing are equal, because these triangles are superposable. Above an...
• (n.) The state of being in proportion.
Pro·por`tion·al'i·ty noun [ Confer French proportionnalité .] The state of being in proportion. Coleridge. 
A principle of EC law whereby an act (e.g. by a public authority) is an abuse of power if it imposes greater restrictions than are necessary to achieve the proper purposes of the power in question.
A relationship in which a quantity is related to the second quantity. See also: Inverse Proportionality, Mathematical Symbol s.
balance noun harmonious arrangement or relation of parts or elements within a whole (as in a design); `in all perfectly beautiful objects there is found the opposition of one part to another and a reciprocal balance`- John Ruskin noun a ratio of two quantities that is constant