Answer
Find out the how much more tax would you pay on a $10 purchase .
To prove
As given
The city of Atlanta recently increased their sales tax from 7.5% to 8%.
Purchase price = $10
7.5 % is written in the decimal form

= 0.075
Tax price on $10 purchase price when tax rate 7.5% = 0.075 × 10
= 0.75
8 % is written in the decimal form

= 0.08
Tax price on $10 purchase price when tax rate 8 % = 0.08 × 10
= 0.8
Increase in tax price on $10 purchase = $0.8 - $0.75
= $ 0.05
Therefore increase in tax price on $10 purchase is $0.05
The option (B) is correct.