In Yucai Middle School, the ratio of boys to girls is 9:10, so how many girls account for the total number of students?
育才中学，男生和女生人数的比是9：10，则女生占总人数的多少
<gadget id="calculator">9 + 10</gadget>
<output>19</output>

<gadget id="calculator">10 / 19</gadget>
<output>10/19 = around 0.526316</output>

<result>10/19 = around 0.526316</result>