Question

The sales tax for an item was $28.80 and it cost $320 before tax. Answer in a percentage (thanks!)

Answer 1

I use an equation, then find the variable
p=price of the item
t=tax
c=total cost
$( \frac{t}{100} \times p) + p = c$
Now, you can figure out the equation by putting in the number, or you can do a shortcut. Find the percentage of 28.8 of 320, and you'll get your answer.
$\frac{28.8}{320} = .09 \times 100 = 9$
It was 9%.

Tell me if this helps!!