The school used 100 tons of water in October, saving 25 tons compared to September. How much was the savings in October compared to September?
学校十月份用水100吨，比九月份节约了25吨．十月份比九月份节约了百分之几？
<gadget id="calculator">100 + 25</gadget>
<output>125</output>

<gadget id="calculator">25 / 125</gadget>
<output>1/5 = around 0.2</output>

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