The production of a batch of parts was originally planned to be completed in 5 days. After the technology was improved, it was actually completed 1 day earlier than the original plan. After the technology was improved, the work efficiency increased by how much?
生产一批零件，原计划5天完成，改进技术后，实际比原计划提前1天完成，技术提高后，工作效率提高了百分之几？
<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>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) / (1/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

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

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