At the grocery store last week, small boxes of facial tissue were priced at 4 boxes for \5.Thisweektheyareonsaleat5boxesfor$4.Thepercentdecreaseinthepriceperboxduringthesalewasclosestto</br>(A)\ 30\% \qquad (B)\ 35\% \qquad (C)\ 40\% \qquad (D)\ 45\% \qquad (E)\ 65\%$