Qiqi downloaded information from the Internet. (1/5) of the total downloads in the first minute, (3/10) of the total downloads in the second minute, and (1/10) less in the third minute than in the second minute. What percentage of the total amount is not downloaded?
奇奇从网上下载资料．第1分钟下载总量的(1/5)，第2分钟下载总量的(3/10)，第3分钟下载的比第2分钟少(1/10)．还剩总量的几分之几没有下载？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(3/10) * (9/10)</gadget>
<output>27/100 = around 0.27</output>

<gadget id="calculator">1 - (1/5) - (3/10) - (27/100)</gadget>
<output>23/100 = around 0.23</output>

<result>23/100 = around 0.23</result>