Answer:
The book club gave Henry a 8.13% discount.
Step-by-step explanation:
To determine the percent discount that the book club gave Henry given that you know the price of the cookbook and the amount of the discount, you can use a rule of three:
39.25 → 100%
3.19 → x
x=(3.19*100)/39.25
x=8.13%
According to this, the answer is that the book club gave Henry a 8.13% discount.