Dilutions - WBC
Formula:
Dilution = Volume of diluent + volume of blood
                            volume of blood
WBC dilution:
Dilution = 0.475 mL + 0.025 mL
                            0.025 mL
Dilution = 20:1 or 1:20 or 20
Note: 25 mL = 0.025 mL