Final answer:
To find the sale price of the shirt, calculate 20% of the original price and subtract it. The sale price of the shirt is $32.
Step-by-step explanation:
To find the sale price of the shirt, you can calculate 20% of the original price and subtract it from the original price.
20% of 40 is 8, so the discount amount is 8.
Subtracting the discount amount from the original price, the sale price of the shirt is 40 - 8 = 32.
Therefore, the sale price of the shirt is $32.