45 students in the sixth grade of Lingnan Primary School participated in the school sports meeting, among which male athletes accounted for (5/9), how many female athletes were there?
岭南小学六年级45个同学参加学校运动会，其中男运动员占(5/9)，女运动员有多少人？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">45 * (4/9)</gadget>
<output>20</output>

<result>20</result>