How to calculate a 20% discount on a $50.00 tire.

To find the discount amount, we need to calculate what 20% of the original price is.

Step 1: Identify the values.
* Original Price (Whole): $50.00
* Discount Percent: 20%

Step 2: Convert the percent to a decimal.
To use the percent in a calculation, divide it by 100 or move the decimal point two places to the left.
$$20\% = 0.20$$

Step 3: Multiply the decimal by the original price.
$$0.20 \times 50.00 = 10.00$$

So, the discount amount is $10.00.

*(Note: The image also shows the final selling price calculation at the bottom right. To find the final price, you subtract the discount from the original price: $\$50.00 - \$10.00 = \$40.00$. However, the main question asks specifically for the discount amount.)*

Final Answer:
The discount is $10.00.