To build a road, 40% of the site was repaired in 5 days, and the remaining 6 days were completed. How much work efficiency has been increased? (no equation solution)
修一条公路，5天修了全场的40%，剩下的6天修完，工作效率提高了百分之几？(不用方程解答)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(3/5) / 6</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(2/5) / 5</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(1/10) - (2/25)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(1/50) / (2/25)</gadget>
<output>1/4 = around 0.25</output>

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