If the subtrahend is equal to (5/8) of the minuend, then how much is the difference less than the subtrahend.
如果减数相当于被减数的(5/8)，那么差比减数少多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / (5/8)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>