In order to alleviate traffic congestion, a city is widening roads. The road width of Tuanjie Road has been increased from 12m to 18m, by what percentage?
为了缓解交通拥挤状况，某市正在进行道路拓宽．团结路的路宽由原来的12m增加到18m，拓宽了百分之几？
<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<gadget id="calculator">6 / 12</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>