There are 80 boys and 60 girls in the sixth grade of Tongle School. How many percent are girls less than boys?
同乐学校六年级有男生80人，女生60人，女生比男生少百分之几？
<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>