$4\mathrm{.}38$ Suppose the Swiss franc revalues from $$0\mathrm{.}40$ at the beginning of the year to $$0\mathrm{.}44$ at the end of the year. U$.$S$.$ inflation is $5\%$ and Swiss inflation is $3\%$ during the year. What is the real devaluation $(-)$ or real revaluation $(+)$ of the Swiss franc during the year?

a$)+7\mathrm{.}9\%$

b$)-5\mathrm{.}3\%$

c$)+8\mathrm{.}1\%$

d$)-1\mathrm{.}6\%$