There are currently 28 boys in class 5 and 3, and 9 fewer girls than boys. What fraction of the number of girls is the number of boys? What percentage of the total number of students are boys?
五3班现有男生28人，女生比男生少9人，女生人数是男生人数的几分之几？男生占全班总人数的几分之几？
<gadget id="calculator">28 - 9</gadget>
<output>19</output>

<gadget id="calculator">19 + 28</gadget>
<output>47</output>

<gadget id="calculator">28 / 47</gadget>
<output>28/47 = around 0.595745</output>

<result>28/47 = around 0.595745</result>