The number of boys in Class 1 is (5/4) times the number of girls, and the number of girls is less than the number of boys ((())/(())).
六1班男生人数是女生人数的(5/4)倍，女生人数比男生人数少((())/(()))．
<gadget id="calculator">5 / 4</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>