Proportion (5)
There are a few possibilities for this:
percentage
'proportion' is the definition.
(I know that scale is a type of proportion)
This is the entire clue.
(Other definitions for scale that I've seen before include "Climb; flake of skin" , "Climb, or series of notes in music" , "range" , "Tones rising maybe" , "Deposit in kettles, etc" .)
'proportion' is the definition.
(I know that proportion can be written as ratio)
This is the entire clue.
(Other definitions for ratio that I've seen before include "Proportion, relation" , "Measure of two relative sizes" , "Comparative measure" , "Proportion of one thing to another" , "Eg, three to one" .)
'proportion' is the definition.
(I know that percentage is a type of proportion)
This is the entire clue.
(Other definitions for percentage that I've seen before include "Proportion stated in hundredth parts" , "cut?" , "Proportion, share" , "Maybe commission" , "Proportion in each 100" .)