Xiaojun’s family used 10 tons of water in September and 8 tons in October. How much water was saved in October compared to September?
小军家九月份用水10吨，十月份用水8吨，十月份比九月份节约用水百分之几？
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>