The number of people in Class 1 who have participated in computer training accounts for 4/5 of the whole class, and the number of people who have not participated in computer training is what percentage of the number of people who have participated in computer training?
六1班参加过计算机培训的人数占全班人数的(4/5)，未参加过计算机培训的人数是参加过计算机培训的人数的百分之几？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / (4/5)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>