Question

The amount of sales tax on a purchase varies directly as the price of the item varies. If a computer costs $400 before tax and the tax is $30 tax, which of the following equations is a correct step in solving for how much tax is needed for a computer that costs $500?

Answer 1

The answer would be 500 ÷ 7.5=

I found this answer by finding the tax rate of the first item, which was 7.5%.