Per·fect (pûr'fĭkt)   adj.

1. Lacking nothing essential to the whole; complete of its nature or kind.
2. Being without defect or blemish: a perfect specimen.
3. Thoroughly skilled or talented in a certain field or area; proficient.
4. Completely suited for a particular purpose or situation: She was the perfect actress for the part.
5. Completely corresponding to a description, standard, or type: a perfect circle; a perfect gentleman.
6. Accurately reproducing an original: a perfect copy of the painting.
7. Complete; thorough; utter: a perfect ratio.
8. Pure; undiluted; unmixed: perfect red.
9. Excellent and delightful

Ra·tio (rey-shoh, -shee-oh) noun1. 

1. the relative magnitudes of two quantities (usually expressed as a quotient) 
2. 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"