Clemence began studying a sample of the chemical element einsteinium-253253253, which naturally loses its mass over time. The relationship between the elapsed time, ttt, in days, since Clemence started studying the sample, and the total mass remaining in the sample, M(t)M(t)M, left parenthesis, t, right parenthesis, in milligrams, is modeled by the following function:
M(t)=200⋅(0.96)t
Complete the following sentence about the daily rate of change in the mass of the sample.