Question

a kid wants to buy a book but it is 18$ the book is diconted to 15 % off but she still has to pay 6% taxes how much dose she pay.

Answer 1

Discounted at 15% off....means the kid actually paid 85%

0.85(18) = 15.30

and then there is the 6% sales tax...
15.30 * 1.06 = 16.218 rounds to $ 16.22 <== what she pays