Thetom's Colour Balancerizer

W
 
W'
 
C
 
C'
 
M
 
M'
 
Y
 
Y'
 
 
 
 

 
 
 

Start with White Cyan, Magenta and Yellow (WCMY) in percentages to add up to 100.
Change one colour (W' or C' or M' or Y'), and calculate.
Balancerizer will alter remaining three colours proportionally to add up to 100%.