If the U$.$S$.$ dollar appreciates from $1\mathrm{.}25$ Swiss franc per U$.$S$.$ dollar to $1\mathrm{.}5$ francs per dollar, then the franc depreciates from $\_\_\_\_\_\_\_\_$ U$.$S$.$ dollars per franc to $\_\_\_\_\_\_\_\_$ U$.$S$.$ dollars per franc.

A$)0\mathrm{.}80$; $0\mathrm{.}67$

B$)0\mathrm{.}67$; $0\mathrm{.}80$

C$)0\mathrm{.}50$; $0\mathrm{.}33$

D$)0\mathrm{.}33$; $0\mathrm{.}50$