40 toys with a cost price of 40 yuan are sold at a price of 40% profit. When 80% of the toys are sold, the remaining toys are sold at a discount, and the resulting profit is 90% of the expected profit. How much discount is the price for the remaining toys when they are sold?
成本价是40元的玩具40个，按40%的利润定价出售．当销售了80%后，剩下的玩具打折出售，结果获得的利润是预计利润的90%，剩下的玩具出售时是按定价打了几折？
<result>8.6</result>