For a manuscript, Xiao Sun printed (1/4) of it in the morning, and printed (1/5) of it less than in the afternoon. What percentage of it is left unprinted?
一份稿件，小孙上午打印了它的(1/4)，比下午少打印了它的(1/5)，还剩下它的几分之几没有打印？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (1/4) - (9/20)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>