Hongxing Machine Tool Factory produced 3,200 machine tools last year, and plans to produce 3,600 this year. What percentage is the increase in production this year compared to last year?
红星机床厂去年生产机床3200台，今年计划生产3600台，今年计划比去年增产百分之几？
<gadget id="calculator">3_600 - 3_200</gadget>
<output>400</output>

<gadget id="calculator">400 / 3_200</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>