It used to take 16 hours to get there by train from A to B, but now the train speeds up and it takes 12 hours to get there. How much time is saved by taking the train from A to B now?
乘火车从甲地去乙地，原来要16小时才能到达，现在火车提速了，12小时就能到达．现在乘火车从甲地到乙地的时间比原来节省了百分之几？
<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>