现对某商品降价10%促销.为了使销售总金额不变.销售量要比按原价销售时增加百分之几？/\1\*f-\2M*I)o/z6p8S1a)H/R5{:A'd
算式：提示3]1n*J9W4b/\1\*f-\2M*I)o/z6p8S1a)H/R5{:A'd
答：为了使销售总金额不变.销售量要比按原价销售时增加'Y+~(L+D1f9[2d.t)L+o+E9F。/\1\*f-\2M*I)o/z6p8S1a)H/R5{:A'd