Since 1997, my country's railways have been speeding up many times. There is a train that originally travels 80 kilometers per hour. After the speed is increased, the speed of this train is 112 kilometers per hour. What percentage is the speed of the train now?
从1997年至今，我国铁路进行多次提速．有一列火车，原来每小时行驶80千米，提速后，这列火车的速度是每小时行驶112千米．现在这列火车提速了百分之几？
<gadget id="calculator">112 - 80</gadget>
<output>32</output>

<gadget id="calculator">32 / 80</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>