Note: The correct answer is premium and $5\mathrm{.}4$ how can we solve this question?

The current U$.$S$.$ dollar$-$yen spot rate is $150\frac{}{\text{\$}}.$ If the $90-$day forward exchange rate is

$148\frac{}{\text{\$}}$ then the yen is selling at a per annum

of

$\%.$

Reminder: Please use one decimal in your answer entry and dot as the decimal point.