Given the information in this question, find the return from covered interest arbitrage by U$.$S$.$ investors with $$500,000$ to invest. S$=$$$1\mathrm{.}12,$ F$=$$$1\mathrm{.}20,$ r$($$$)=8\%,$ r$($euro$)=5\%.$ Express your answer as a percentage. Do not write any symbol. For example, write $23\mathrm{.}35$ for $23\mathrm{.}35\%.$