What is the total cost of $19.99 with 2% tax?

To get 1% of a number simply divide by 100. So 19.99 / 100 = 0.1999

So 1% of 19.99 = 0.1999

Then multiply by two to get 2%

So 0.1999 * 2 = 0.3998

Then add to the original amount.

0.3998 + 19.99 = 20.3898

(Rounded) = $20.40