Question

Alex and Lara have $21.00 each to spend at a book fair, where all students receive a 35% discount. They both want to purchase a copy of the same book, which normally sells for $28.50 plus 10% sales tax. To check if he has enough to purchase the book, Alex takes 35% of $28.50 and subtracts that amount from the normal price. He takes 10% of the discounted selling price and adds it back to find the purchase amount. Lara takes 65% of the normal purchase price and then computes 110% of the reduced price. Is Alex correct? Is Lara correct? Do they have enough money to purchase the book?

Answer 1

Is Alex Correct and they don't have enough money to purchase the book.
28.5x35/100=7.12
28.5-7.12=21.38
Then add 10% to find the purchase amount.
21.38x10/100=2.14
21.38+2.14= $23.52 > 21.00