The yield of corn per hectare in Qinzhuang reached 8 tons last year. After the improvement, it will reach 9.6 tons per hectare this year. What percentage is the increase compared with last year?
秦庄去年玉米每公顷产量达到8吨，进行改良后，今年每公顷达到9.6吨，比去年增产百分之几？
<gadget id="calculator">9.6 - 8</gadget>
<output>1.6</output>

<gadget id="calculator">1.6 / 8</gadget>
<output>0.2</output>

<result>0.2</result>