Final answer:
The price of the dress was marked down by 20% from the original price of $60 to the sale price of $48.
Step-by-step explanation:
Mary bought a dress that normally costs $60 for $48, and we need to calculate by what percent the price was marked down.
To find the markdown percentage, we subtract the sale price from the original price and then divide by the original price. Finally, we multiply the result by 100 to get the percentage.
So, the markdown is calculated as follows:
Original Price = $60
Sale Price = $48
Markdown Amount = Original Price - Sale Price = $60 - $48 = $12
Markdown Percentage = (Markdown Amount ÷ Original Price) x 100 = ($12 ÷ $60) x 100
After calculating the above, we get:
Markdown Percentage = 20%