The number of boys in Xinxing Primary School was reduced by 20% to equal the number of girls. How many fewer girls than boys in school
新星小学的男生人数减少20%后和女生人数相等．学校中女生人数比男生少多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>