Part 1: Solving for the amount of discount
Convert 50% into decimal by dividing it by 100%

Multiply 0.5 to the original price, to get the amount of discount

Therefore, the amount of discount is equal to $29.79.
Part 2: Solving for sale price.
Since we already have the amount of discount, subtract the discount to the original price, to get the sale price. That is

Therefore, the sale price is $29.79.