The output value of a company this year is 1.21 million yuan, an increase of 660,000 yuan over last year. What percentage is the increase this year compared to last year? What is the correct column
某公司今年产值121万元，比去年产值增加66万元，今年比去年增加了百分之几？正确列式是多少
<gadget id="calculator">121 - 66</gadget>
<output>55</output>

<gadget id="calculator">66 / 55</gadget>
<output>6/5 = around 1.2</output>

<result>6/5 = around 1.2</result>