Answer :
Convert the 10% to a decimal by dividing by 100 (= 0.10). Then multiply that by 280.
280 x 0.10 = $28 tax
Add the tax to the cost & you have
280 + 28 = $308.
280 x 0.10 = $28 tax
Add the tax to the cost & you have
280 + 28 = $308.