How do you think ratios are used in paint mixtures?

Paint is an emulsion that is a mixture of different components such as pigments, solvents, binder and additives. Ratios are made use because there are different kinds of paints according to the solvents used, the pigments and additives used, the color or hue which all requires different ratios of the components. 

Johns shoe size is 2. if there are three people out of the family and two people in the family have size 6 feet. Then the range of the shoe sizes  is 4. Essentially 6-2=4.