In Februаry оf 2025, the Xbоx Series X wаs priced аt $449 and sоld 600 units. At the same time, the Playstation 5 was priced at $499 and sold 300 units. To increase sales, in March Sony lowered the price of the PS5 to $400 and sold 375 units. Sales of the Xbox fell to 500 units as the price remained at $449. Calculate the implied cross-price elasticity. (Format your answer as X.XX).