If the number of boys is 125% of the number of girls, how much fewer girls are there than boys?
如果男生人数是女生人数的125%，那么女生人数比男生人数少多少
<gadget id="calculator">125 / 100</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) - 1</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

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