The fertilizer factory produced 360 tons of compound fertilizer in May, an increase of 40 tons compared to the plan. What percentage increase?
化肥厂五月份生产复合肥360吨，比计划增产40吨，增产百分之几？
<gadget id="calculator">360 - 40</gadget>
<output>320</output>

<gadget id="calculator">40 / 320</gadget>
<output>1/8 = around 0.125</output>

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