I seem to have forgoten how to do my VAT maths?

• trade discount
• how to trade stocks
• learn to trade
• calculate retirement income
• calculate percentage salary increase

I've forgotten how to do what should be a simple maths question. Goods which would normally cost 5600, and having to calculate the price after discount to be 4928. What percentage trade discount being deducted

I seem to have forgoten how to do my VAT maths?