If the original price is $75 and a 20% coupon was used then the price of the ticket is 80% of the original price and so:
[tex]75 \times 0.80 = 60[/tex]
Then a 10% service fee we have:
[tex]60(1 + 0.10) = 60(1.10) = 66[/tex]
So the final price paid is $66. By what percent less we will use the percent difference formula:
[tex] \frac{75 - 66}{75} \times 100 = 12[/tex]
Therefore the price is 12% less than the original price of $75.
