Congress would like to increase tax revenues by $5\mathrm{.}5$ percent. Assume that the average taxpayer in the United States earns $$56,000$ and pays an average tax rate of $20$ percent.

Required:

If the income effect is in effect for all taxpayers, what average tax rate will result in a $5\mathrm{.}5$ percent increase in tax revenues?

Note: Round your answer to $2$ decimal places.