Answer:
State income tax rate for his state is 4.34 % .
Explanation:
Formula

As given
Hymie Caddiddle is a truck driver who earns $56,000 a year driving cross-country.
He is single with no dependents. He pays $2,430 in yearly state taxes.
Part value = $2430
Total value = $56000
Putting all the values in the formula


Percentage = 4.34 % (Approx)
Therefore the state income tax rate for his state is 4.34 % .