There are 35 boys and 15 girls in the third grade. How many girls account for the whole class?
三年级有男生35人，女生15人，女生人数占全班人数的多少．
<gadget id="calculator">35 + 15</gadget>
<output>50</output>

<gadget id="calculator">15 / 50</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>