Jieyang Experimental Primary School used 160 tons of water in August, saving 40 tons of water compared to July. What percentage of water is saved?
揭阳实验小学八月份用水160吨，比七月份节约用水40吨，节约用水百分之几？
<gadget id="calculator">160 + 40</gadget>
<output>200</output>

<gadget id="calculator">40 / 200</gadget>
<output>1/5 = around 0.2</output>

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