The cost of the shoes after discount is (1-0.2)s .
What is Discount ?
The definition of discount is when something is being sold at a price lower than the original one.
The basic way to calculate a discount is to multiply the original price by the decimal form of the given percentage rate.
To calculate the sale price of any item, we need to subtract the discount from the original price.
Rosalie purchases shoes and clothes.
The expression representing her total cost (including 7% tax) is c+(1-0.2)s + 0.07[c+(1-0.2)s]
Here it can be easily identified that cost of the shoes after discount is (1-0.2)s , if s is the selling price.
and 20% = 1-0.2 of the original price.
Therefore The cost of the shoes after discount is (1-0.2)s .
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