Wholesaler D is offering an item with trade discounts of 20% and 10% whereas Wholesaler H is offering the same item with trade discounts of 25% and 15%. Which wholesaler has the low net price if the list price of Wholesaler D is 10% less than that of Wholesaler H?

Answer 1

hmmm. They have told you that if the list price is x, then the marked-down prices are
D(x) = 0.80 * 0.90 = 0.72x
H(x) = 0.75 * 0.85 = 0.6375x
See what you can do with that...