Zhoushan is a small island city short of water. Every citizen of Zhoushan should save water. A person uses about 125 liters of water to take a bath in a bathtub. If it is changed to a shower, 25 liters of water is enough. How many percent is saved?
舟山是个缺水的海岛小城，我们每个舟山市民都要节约用水．一个人用浴缸洗一次澡大约用水125升，如果改为淋浴，用25升水就够了，节约了百分之几？
<gadget id="calculator">125 - 25</gadget>
<output>100</output>

<gadget id="calculator">100 / 125</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>