The regular price is $20. The sale price is $20. What is the discount rate?

Wait my mistake i mean regular price %25

Again $25 :P

Do you mean the regular price was $25?

5/25 = 0.2 = 20% discount.

To find the discount rate, you need to calculate the difference between the regular price and the sale price, and then express it as a percentage of the regular price.

In this case, the regular price is $20 and the sale price is also $20. The difference between the regular price and sale price is $20 - $20 = $0.

To find the discount rate as a percentage, you divide the difference by the regular price and then multiply by 100:

($0 / $20) * 100 = 0 * 100 = 0%

Therefore, the discount rate would be 0%.