Dan claims that the sales tax going from 5% to 6% is only increasing the sales tax by 1 percentage point. Stan says that the sales tax is going up by 20%.

Question

story problems from Mathematics for educators.  need to also know who is correct and why?

Answer 1

STAN IS WRONG BECAUSE WHEN WE THINK OF THE PERCENTAGE =

(1/6) * 100

 

= 16.666 % and not 20%

 

DAN IS RIGHT BECAUSE PP

=6 - 1 

= 5