Answer
You will pay $0.20 (20 cents) more on a $20 purchase.
Explanation
To find a percentage of any number we just need to multiply the number by the percentage and divide by 100
First, we'll find the 7% of $20:
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Next, we'll find the 8% of $20:
\(\frac{8*20}{100} =\frac{160}{100} =1.60\)
Finally, we just need to subtract $1.40 form $1.60:
\(Tax Increment=1.60-1.40=0.20\)
We can conclude that after the increasing of sales tax from 7% to 8%, you will pay $0.20 (20 cents) more on a $20 purchase.
