Final answer:
The sale price is calculated by first determining the discount amount, which is the marked price multiplied by the discount rate (expressed as a decimal), and then subtracting this amount from the marked price. The sale prices for the given discounts are $16, $54, and $35 respectively.
Step-by-step explanation:
Calculating Sale Price After Discount
To calculate the sale price after a discount, you first need to determine the discount amount by converting the discount percentage to a decimal and then multiplying it by the marked price. Subtract the discount amount from the marked price to find the sale price.
1. With a marked price of $20 and a 20% discount, the calculation would be:
$20 × 0.20 (discount rate) = $4 (discount amount).
$20 - $4 = $16 (sale price).
2. For a marked price of $60 and a 10% discount:
$60 × 0.10 (discount rate) = $6 (discount amount).
$60 - $6 = $54 (sale price).
3. If the marked price is $50 and the discount is 30%:
$50 × 0.30 (discount rate) = $15 (discount amount).
$50 - $15 = $35 (sale price).