Melanie began studying a sample of the chemical element einsteinium-$253$, which naturally loses its mass over time. The relationship between the elapsed time, $t$, in days, since Melanie started studying the sample, and the total mass remaining in the sample, $M(t)$, in micrograms, is modeled by the following function: ###$M(t)=169\cdot (0.96)\^{\Large t}$ **Complete the following sentence about the daily percent change in the mass of the sample.** Every day, [[☃ numeric-input 2]]$\%$ of mass is [[☃ dropdown 3]] the total mass of the sample.