某洗染厂,上半年计划用水400吨,实际用水388吨,节约了百分之几?)e,W1?,h-d)R3z1B+E)W7i
解:
算式:提示+x/L'J:{)e,W1?,h-d)R3z1B+E)W7i
答:节约了百分之3S+]3?7N2M9?。)e,W1?,h-d)R3z1B+E)W7i