Galaxy Jewelers sells diamond necklaces for $500.00 less 6 %. Starlight Jewelers offers the same necklace for $527.00 less 39%, 18%. What additional rate of discount must Galaxy offer to meet the competitor's price? The additional rate of discount that Galaxy Jewelers must offer to meet the competitor's price is % (Round to two decimal places as needed. Round all intermediate values to six decimal places as needed.)