There are 36 sixth-grade students participating in the Go interest group, which is 20% more than those participating in the painting group. How many people participate in the painting interest group? (Solve with ratio)
六年级学生参加围棋兴趣小组的有36人，比参加绘画小组的人数多20%，参加绘画兴趣小组的有多少人？(用比例解)
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">36 / (6/5)</gadget>
<output>30</output>

<result>30</result>