What is the percent of blowdown for a safety valve set to pop at 300psi and reseat at 275 psi?

%BD = (PP - RP) / PP
                               %BD = (PP - RP) / PP
                               %BD = (300 - 275) / 300
                               %BD = 8.33%
Where,
                               %BD percent of blowdown
                               PP      popping pressure
                               RP      reseat pressure