A person travels from A to B, on the first day he walked the whole distance (3/17), on the second day he walked the whole distance (8/51), on the third day he walked the whole distance (1/6), and the remaining What percentage of the whole journey did not go?
某人从甲地到乙地，第一天走了全程的(3/17)，第二天走了全程的(8/51)，第三天走了全程的(1/6)，还剩全程的几分之几没走？
<gadget id="calculator">3 / 17</gadget>
<output>3/17 = around 0.176471</output>

<gadget id="calculator">8 / 51</gadget>
<output>8/51 = around 0.156863</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (3/17) - (8/51) - (1/6)</gadget>
<output>1/2 = around 0.5</output>

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