The construction of sewage pipes in Xinghuo Town was 120 meters on the first day and 140 meters on the second day. How much less was repaired on the first day than on the second day?
星火镇修建排污管道，第一天修了120米，第二天修了140米，第一天比第二天少修了几分之几？
<gadget id="calculator">140 - 120</gadget>
<output>20</output>

<gadget id="calculator">20 / 140</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>