Explanation:
for Boston
100% = 70,000
28% of that have to be paid in taxes.
so, what is left is
100% - 28% = 72%
72% = 100% × 72/100 = 70,000 × 0.72 =
= $50,400
similar for Dallas
100% = 63,000
19% have to be paid in taxes.
so, what is left is
100% - 19% = 81%
81% = 100% × 81/100 = 63,000 × 0.81 =
= $51,030
so, Dallas will give more take-home amounts.