A factory used 800,000 tons of water in September and 700,000 tons in October. How much was the saving in October compared to September?
某工厂九月份用水80万吨，十月份用水70万吨，十月份比九月份节约了百分之几？
<gadget id="calculator">80 - 70</gadget>
<output>10</output>

<gadget id="calculator">10 / 80</gadget>
<output>1/8 = around 0.125</output>

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