The number of boys in a school this semester has increased (1/5) compared to the original number, and the number of girls has decreased (1/10) compared to the original number. As a result, the total number of students in the school has increased (1/15) compared to the original number. Find the percentage of the total number of girls in the original school How much? (Column formula solution)
某校本学期男生人数比原来增加了(1/5)，而女生人数比原来减少了(1/10)，结果全校总人数比原来增加了(1/15)，求原来女生占总人数的几分之几？(列算式解答)
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/5) - 1 - (1/15)</gadget>
<output>-13/15 = around -0.866667</output>

<gadget id="calculator">1 + (-13/15)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) - 1</gadget>
<output>-9/10 = around -0.9</output>

<gadget id="calculator">1 + (1/5) + (-9/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/15) / (3/10)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>