Xiao Li used to produce 4 parts in 10 minutes, but now produces 11 parts in 25 minutes. How much is the work efficiency improved?
小李原来10分钟生产4个零件，现在25分钟生产11个零件，工效提高了百分之几？
<gadget id="calculator">11 / 25</gadget>
<output>11/25 = around 0.44</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(11/25) - (2/5)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) / (2/5)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>