The amount of money that Han saves by using a coupon is $1.5%
The percentage off Clare's purchase with the coupon is 25%
A coupon reduces the price at which an item is sold
Amount saved = coupon discouunt x normal price
10% x $15
0.1 x $15 = $1.5
Percent off = (6/24 x 100 = 25%
To learn more about how to calculate discounts, please check: https://brainly.com/question/26061308