Hasan plans to choose a book from a section of the store where everything is 25% 25 % off. he writes the expression d? 0.25d d - 0 . 25 d to find the sale price of the book if the original price is d d dollars. bella correctly writes another expression, 0.75d 0 . 75 d , that will also find the sale price of the book if the original price is d dollars. use the drop-down menus to explain what each part of hasan's and bella's expressions mean.