To build a road, (8/15) of the total project was completed in the first week, and (5/12) of the total project was completed in the second week, what fraction of the total project was completed to complete the whole task?
修一条路，第一周完成了总工程的(8/15)，第二周完成了总工程的(5/12)，再修总工程的几分之几就完成了全部任务？
<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(8/15) + (5/12)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>