Shamin Jewelers sells diamond necklaces for $422.00 less 9%. Magnifico Jewelers offers the same necklace for $487.00 less 30%, 15%. What additional rate of discount must Shamin offer to meet the competitor's price? The additional rate of discount that Shamin 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.)