What is 30 off of $40?

When a discount of 30% is applied to a price of $40, it means that the price is reduced by 30% of $40.

To calculate the discount amount, you multiply the original price ($40) by the discount rate (0.30 or 30% expressed as a decimal):

Discount = $40 * 0.30 = $12

So, the discount on this item is $12.

To determine the final price after the discount is applied, you subtract the discount amount from the original price:

Final Price = $40 - $12 = $28

Therefore, the final price after a 30% discount is $28.