The number of students participating in the mathematics interest group this year has increased by 12% compared to last year. What percentage of the students participating in the mathematics interest group this year is last year?
今年参加数学兴趣小组的同学比去年增加了12%，今年参加数学兴趣小组的同学是去年的百分之几？
<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">1 + (3/25)</gadget>
<output>28/25 = around 1.12</output>

<result>28/25 = around 1.12</result>