It's a holiday, and Xiaohong is going to grandma's house. It used to take 10 hours by train, but now it takes 8 hours. Now, how much time is saved by taking the train to grandma's house?
放假了，小红要去奶奶家，原来乘火车需10小时，现在8小时就能到，现在乘火车去奶奶家的时间比原来节省了百分之几？
<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>