Among the students who participated in various sports interest groups in our school last year, 20% were girls. The total number of students in the school this year is the same as last year, but the number of students participating in various sports interest groups has increased (1/5), and the number of girls accounts for the total number of students. (1/4) of the number of girls, so how many percent will the number of girls participating in various sports interest groups this year increase compared to last year?
我校去年参加各种体育兴趣小组的同学中，20%是女生，今年全校的总学生数同去年一样，但参加各种体育兴趣小组的学生增加了(1/5)，其中女生人数占总人数的(1/4)，那么今年女生参加各种体育兴趣小组的人数比去年增加百分之几？
<gadget id="calculator">1 / 5</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">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(6/5) * (1/4)</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(3/10) - (1/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / (1/5)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>