A company purchased a batch of computers, of which (2/5) are new models, how much of the old models accounted for this batch of computers.
某公司购进一批电脑，有(2/5)是新型号，旧型号占这批电脑的多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>