If the ratio of boys to girls in a class is 3:2, what is the percentage of boys in the class?
某班男生人数与女生人数的比是3：2，则男生人数占全班人数的多少．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>