A factory used 320 tons of water in June, and saved 40 tons in July compared with June. What percentage is the saving compared with June?
某工厂六月份用水量320吨，七月份比六月份节约了40吨，比六月份节约百分之几？
<gadget id="calculator">40 / 320</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>