You would take 18 and divide by 25. To get .72 or 72%. [tex]18 \div 25 = .72[/tex] Then You subtract 72% from 100% to get the percent discount. [tex]100 - 72 = 28[/tex] So, the book is 28% off.
Step-by-step explanation: Okay so to find the discount you subtract 18 from 25. You end up getting 7. You divide 7 by 25 to get the decimal or discount percentage. You get the decimal which is 0.28 and then change that to 28%
