There is no difference. 68% discount and 6.8% discount both mean that the price of goods or services is 68% or 6.8% of the original price. These two expressions only use different numerical expressions. Whether it is 68% discount or 6.8% discount, the essence of discount is the same, that is, consumers need to pay 68% or 6.8% discount of the original price to buy goods or services. Therefore, it can be said that these two expressions are equivalent in terms of discount strength.