In July, 360 tons of water was used, 40 tons less than in June, and what percentage was saved compared to June?
七月份用水360吨，比六月份节约40吨，比六月份节约百分之几？
<gadget id="calculator">360 + 40</gadget>
<output>400</output>

<gadget id="calculator">40 / 400</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>