After the reconstruction of Jinwen Railway in 2014, it only takes 1.5 hours to travel from Lishui to Hangzhou by train, which is 70% shorter than the current time taken by train to Hangzhou.
2014年金温铁路改建后，从丽水乘坐火车到杭州只要1.5时，比现在乘坐火车到杭州所用的时间缩短了70%，改建后比现在乘坐火车到杭州节省了多少时间？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1.5 / (3/10)</gadget>
<output>5</output>

<gadget id="calculator">5 - 1.5</gadget>
<output>3.5</output>

<result>3.5</result>