There are 121 computers in Experimental Primary School this year, an increase of 66 compared to last year. By what percentage is the increase in the number of computers this year compared to last year?
实验小学今年有计算机121台，比去年增加了66台，今年计算机的台数比去年增加了百分之几？
<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>