Given an APR of $16\%,$ what is the theoretically highest possible EAR?

Hint: Think about the number of compounding$/$discounting periods per year, how many of those periods in a year would give you the highest possible EAR?

Note: Show your answer in units of percent, use plain numbers with at least two digits after the decimal $($e$.$g$.,$ for $12\mathrm{.}34\%,$ type $12\mathrm{.}34).$