The electric fan factory originally planned to produce 1 million electric fans, but now it has produced 1.2 million. What percentage of the increase? What is the column
电扇厂原计划生产电扇100万台，现在生产了120万台，增产了几分之几？列式是多少
<gadget id="calculator">120 - 100</gadget>
<output>20</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>