The road repair team repaired a (5/4) kilometer road, and repaired the entire length (2/15) in the first week, and repaired the entire length (3/10) in the second week, leaving a fraction of the entire length unrepaired ?
修路队修一条(5/4)千米的路，第一周修了全程的(2/15)，第二周修了全程的(3/10)，还剩下全程的几分之几没有修？
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (2/15) - (3/10)</gadget>
<output>17/30 = around 0.566667</output>

<result>17/30 = around 0.566667</result>