You are pleased to see that you have been given a $6\mathrm{.}67\%$ raise this year. However, you read on the Wall Street Journal Web site that inflation over the past year has been $1\mathrm{.}86\%.$ How much better off are you in terms of real purchasing power?

$($Note: Be careful not to round any intermediate steps less than six decimal places.$)$

Your real purchasing power is $\%.($Round to two decimal places.$)$