How is VAT calculated with discounts?

VAT is calculated on the discounted price of the product.

For example, if the price of an item is 110 AED and the seller gives a discount of 10 AED, then the VAT on the product is 5% of 100 AED. The total cost of the product would be 120 AED (100 AED purchase price + 20 AED of VAT).