Answer:
92.35% or 77.35%
Explanation:
We have that the total salary represents 100%.
After taxes in a city where all taxes apply would be:
100% - 6.2% - 1.45% - 15% = 77.35%
Which means, that in this case, the salary after tax would be 77.35%.
In Alex's case, there is no state income tax, if this tax is the same as the federal income tax, his income would be:
100% - 6.2% - 1.45% = 92.35%
That is, 92.35% of their original salary.
If these two taxes are different, your income would be 77.35%.