Question:
If a product originally selling for $35.00 is marked down by 10%, what is the discounted retail selling price?

Answer:
What is 10% of $35?
10% of $35 = $3.50
$35 - $3.50 = $31.50
So the discounted retail selling price = $31.50

Mathematically Solved: First, set up the quation, solve the parenthesis, solve problem
Step 1: 35 - (35*.10)
Step 2: 35 - 3.5
Step 3: 31.50

Equation
DiscountedRetailSellingPrice = SellingPrice - (SellingPrice * MarkDownPercent)