1., 20% ÷ 0.9 = 22.2% 答: 这批米奇服装定价时的利润率是22.2% .2, (1 + 40%)x 80% + (1+40%) ÷ 2 x (1 - 80%) - 1 = 26% 答:销完这些巧克力糖后,商店实际的利润率有 26% .