An item costs $420 before tax, and the sales tax is$ 16.80 whats the sale tax rate

We need to set up an equation to solve this problem.  The sales tax is a percentage of the total, so that's what we are looking for.

Let's call S our sales tax

So, that's what we are looking for, and we are given the actual sales tax

So now we have a decimal.  In order to convert a decimal into a percentage, we must multiply by 100 (since percentages are out of 100)

The sales tax rate is 3.8%

for the points! : )

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2