Year Expenditures Tax Revenues GDP 1 $350 $195 $2,675 2 $310 $215 $3,075 3 $370 $240 $3,575 4 $420 $270 $3,775 Suppose that initially there is no public debt. Using the above table, the public debt as a percent of GDP in year 4 was D%. (Enter your response rounded to one decimal place.)