A credit card company charges you an interest rate of $2\%$ monthly $($i$.$e$.,2\%$ per month on the card's outstanding balance$).$ This rate is not a per annum rate $($i$.$e$.,$ not an APR$)$ but a rate per month. The effective annual rate is $($Enter your answer as a percentage rounding to $100$ th of a percent, e$.$g$.,12\mathrm{.}34)$