Element X is a radioactive isotope such that its mass decreases by 11% every year. If an experiment starts out with 530 grams of Element X, write a function to represent the mass of the sample after t years, where the quarterly rate of change can be found from a constant in the function. Round all coefficients in the function to four decimal places. Also, determine the percentage rate of change per quarter, to the nearest hundredth of a percent.